GB2557590A - A rainwater harvesting system - Google Patents

A rainwater harvesting system Download PDF

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Publication number
GB2557590A
GB2557590A GB1620967.8A GB201620967A GB2557590A GB 2557590 A GB2557590 A GB 2557590A GB 201620967 A GB201620967 A GB 201620967A GB 2557590 A GB2557590 A GB 2557590A
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GB
United Kingdom
Prior art keywords
rainwater
building
storage tank
rainwater storage
harvesting system
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
GB1620967.8A
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GB201620967D0 (en
Inventor
Webster Robert
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Webster Robert
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Priority to GB1620967.8A priority Critical patent/GB2557590A/en
Publication of GB201620967D0 publication Critical patent/GB201620967D0/en
Publication of GB2557590A publication Critical patent/GB2557590A/en
Application status is Pending legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/02Methods or installations for obtaining or collecting drinking water or tap water from rain-water
    • E03B3/03Special vessels for collecting or storing rain-water for use in the household, e.g. water-butts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D35/00Other filtering devices; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/027Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/10Relating to general water supply, e.g. municipal or domestic water supply
    • Y02A20/102Tanks
    • Y02A20/106Tanks for domestic applications
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/10Relating to general water supply, e.g. municipal or domestic water supply
    • Y02A20/108Rainwater harvesting

Abstract

The rainwater harvesting system 100 comprising a rainwater collector 700, a rainwater storage tank 400, a rainwater treatment assembly 722 and a treated water supply line. The rainwater storage tank is housed within a rainwater storage tank housing 300 which is assembled on-site and is constructed and located over-ground. The rainwater collector supplies collected rainwater to the rainwater storage tank, the rainwater storage tank stores the rainwater until theres a demand for the water from the building. The rainwater storage tank then supplies the rainwater into the rainwater treatment assembly, the treated water is then supplied to the treated water supply line (304, figure 1), providing the building with treated water.

Description

*-A rainwater harvesting systemi?

This invention reiates to a rainwater harvesting system. in particular, the present invention is defected towards harvesting rainwater for us© in non-potabie and potablesituailons.

Throughout this specification, the: term: “rainwater” shaft be understood to encompass any type of rain, run-ofewater, overflow water and the iikewhiohwouid otherwise be directed to gullies or end up as ground water if it were not harvested fey ftepressnt invention.

Harvesting rainwater is welFknown.: As environmental issues: have grown through the over-use of water, finding ways to collect and αϋ; rainwater locallyy even at a household level, has: feebomd more important in recent: femes. There Sfe: rnany examples of prior ad assemilies for harvesting rainwater and using the rainwater in potable and non-potacle situations. These prior art:: systems typically collect rainwater from a sousce, such as a gutter Or directly' from a rooftop. The collected rainwater is then SdhsedMentiy stored -η a storage: tank until it is needed, in almost all cases, the stored; rafnwafer will be treated to a varying degree, even for non-potable situations as il ls desirable to remove unwanted particles and did and soon from the collected rainwater. Therefore, when a demand for the rainwater arises, the rainwater which is stored in ihe rainwater storage tank is pumped and treated by varylhi degrees in order to provide a supply of non-potable or potable water, depending on the requirements Of the user.

Very often the rainwater storage tank will be buried uncergmund adjacent the building which is using the prior art rainwater harvesting system. For a residential household, this will usually mean that: the rainwater storage tank is buried ih a back garden dr a side garden M the feouse. As cab be imagined, this ;s quite intrusive to the homeowner as ewssvatlon work is very ilma-osnsumihg and causes a large: disturbance and a lot of disorder for the homeowner. This j| a dissuading factor for some people who would have otherwise installed a fathweief harvesting system. The cost of burying a large storage tank underground ss also relatively high and forms a large part of the cpSfS: Of installing a rainwater harvesting system. As investors:; in such a rainwater harvesting: System are looking for a payback on their investment;, It Is important to: keep the ihsieilation costs to a minimum In order to make the us@ a rainwater harvesting:: system more attractive for potential oostomersfdsers/i nvesfors. in ali<: ifho prior art rainwater harvesting systems; which require the us® a Singlepiece formed tank buried underground requires a lot of excavation work which is expensive: and also disruptive to the homeowners as large excavation equipment needs to be brought in to excavate the hole for burying me storage tank.

Furthermore, the control and pumping equipment must be located somewhere above ground for ease of access. If this; is located in the building itself, it can be unsightly and can also take up space within the building which is undesirable from a building user's perspective. Alternatively, a pump houses could be constructed to bo built to accommodate the control equipment, pump equipment and the like, in addition to carrying out the excavation works on the ground in order to bury the rainwater storage tank undergmuhd, Building these pump houses ftom traditional; building methods such as using; bricks and mortar is a time-consuming and somewhat expensive process

It will be further appreciated thaf the 1'widespread1 use of the rainwater harvesting systems, such as the present Invention, wlil prpylde a positive impact on the level of ground water, As the rainwater is stored and not allowed to flow directly lip: the ground, this will ease the amount of rainwater entering the ground and heOemlng groundwater. Arty COSi savings and installation easing which will promote and: facilitate the widespread use Of fainweter harvesting systems will help with reducing groundwater, which pen be quite probiematic In recent time tor many low lying areas of land.

It is a goal of the present jnyehfidh to provide a method andfpr apparatus that overcomes at leas! one of the above mentioned problems.

Sanroary of the Invention

The; present invention is directed to.....a rainwater harvesting system for a building;:: the rainwater harvesting system comprising a rainwater collector, a rainwater storage tank, a rainwater treatment assembly and a treated water supply line; the: rainwater collector being suitable tor attachment to ad existing gutter of the: building; wherein, ihe rainwater storage tank ie bodied vwthsn a rainwaterMdrage tank housing which is assembled on-site: and; is oonstruoted end located overground; the rainwater coflector supglysog: coliected rainwater to the rainwater Sldrdge tahl, the rainwater storage tank storing the rainwater until there is a demand tor the water from the building; the: rainwater storage tank supplying: the rainwater into the rainwater treatment assembly so that the rainwater is treated to become treated water; and, the treated water Is supplied to the treated water supply line in order to provide the treated water to the building.

The: advantage of a ssem bling the rainwater storage: tank housi ng: on-site is that the rainwater storage tank housing pay be brought: onto the site m a broken down, modular, state. This will allow the rainwater storage tank housing to be constructed; on sites which have limited site access. For example. In residential houses, where the rainwater Sioia|e tank Is likely to be situated In the back garden or side garden of the house, there does not need to be access for a mechanical digger to the back garden or side garden. It Is possible; to construct the rainwater harvesting system of the present inventionin a reiative|f :ea%rfashion in a back garden of a terraced house for example, Jts the rainwater storage tank housing; is constructed and located above ground, the disturbance to the house owner is reduced with a shorter construction time on site, and as no excavation needs to be done, the area will not become as disturbed as: would be necessary if ekdavation was repaired

It wlii be appreciated that in some embodiments, the rainwater storage tankitseif may also be of a modular farm and may'; thus be assembled on-site. However, the costs of such modular rainwater tanks can: be: relatively high and this wouid be counter to one of tfne main goals of the present jave:n$©f? which is to greatly reduce the capital costs associated' with the: installation of rainwater harvesting systems.

In a further embortimehi:, the rainwater storage tank housing is assembled on-site using:: moduNi pieces:; Whereby the modular pieces of the rainwater storage tank housing hive been prepared off-site in a workshop. It is envisaged to construct sectional pieces of tte: assembling the rainwater storage tank housing off-site, and minimise the:: gresito assembly time whilst! ensuring the sectional pieces of fb®:: assembling the rainwater storage tank housing can be passed through a normal door opening. It will be appreciated that the majority of standard residential: ddprS: th houses are;: between Tiimm;: and ©80 mm in width, and, between 1900mm and 2400mm in height. The mjhwoter storage: tank housing: can b© thus assembled onsite after the modular seelions/pieees of the rainwater storage tank housing: have boon brought through a house:ln seclons and pieces. in a further embodiment, the modular pieces of the rainwater storage tank housing are dimensioned so as to be able to pass through a standard door opening.: inv a further embodiment, the modular pieces of therainwaier storage tank housing are dimensioned so as to be able to paps through a rectangular opening having a Width between TSOmfri: and 950mm, ami a height between 1900mm arid;2400mm. in a further embodiment, the modular pieces comprise paneis of an outer protective layer and an Intermediate insulating layer. The panels may be preferably rectangular in shape aid have a depth of approximately: 52mm, a teh|th: of approximately 1150mm and a height of approximately 2550mm:· This wiii allow the: panois to be: ear?|^ a standard door when rotated on to their side. in a further embodiment, the building is connected to a mains water supply and the rainwater harv'esfing system comprises a meins wafer supply solenoid which can fee: switched between open and closed positions in order to permit or prohibit mains water from being supplied to fhe huildihl; from the mainwaier supply.

In a further embodiment, the mains wafer supply solenoid is controlled by a pressings sensor installed on therfreafpd::water supply lips, in a further embodiment, when the prsssuro sensor "senses a sufficient id* Of fiestad water in the treated water suppjyfinSy the pressure sensor will commuhiosie: p: control signal to the mains water supply solenoid; in order to place the mains water supply solenoid in its closed position SO as to prohibit mains water from being supplied to the bulling.. in this way, the mains water supply can he used as a back-up water supply for the buliding should the rainwater harvesting system of the present Invention prove uhahie tbiproduee a Sufficient flow of treated water to the: building, in a rubber ©f^ the pressure sensor senses an Insufficient fiow of treated water Ibbba treated Water supply line, the pressure sensor will communicate a Control signal to the maths water supply solenoid in order to place the mains water supply solenoid in its open position so as to: permit maps wafer to be supplied to the building, in a further embodiment, the rainwater treatment assembly comprises an In-line ultra-vidiet light to irmdlaie the rainwater, in a further embodiment, the rainwater treatment assembly comprises a filter to remove unwanted partictes from the rainwater, in a further embodiment, the rainwater treatment assembly comprises: an in-hne aerator to add ozone to the rainwater, In a further embodiment, the rainwater ooiibefor comprises a hopper head, in a further embodiment, the hooper bead comprises an inlet filter. in a iiurther embodiment, the rainwater storage tank housing comprises an outer protective sheeting and: an; intermediato insulating layer between the outer protective sheeting and the rainwater storage tank, in one embodiment, the outer protective sheeting and the intermediate insulating layer and connected together to form modular panel pieces in amplf^liiapd are transported on-site for assembly on-site. The dimensions of the modular panel pieces are such as to ho able to fit through a standard:door of a building. in a forlher embodiment the outer protective sheeting is sheet metal, in a further otehOdifnenf the intermediate insulating layer is approximately 50rnrn in thickness so as tei ihsulatai the rainwater storage tank and also provide a rigidity to the outer IproteotiyO: sheeting. In a further embodiment, the rainwater storage tank can hold; approximately stnaximum of 1,0001 of liquid.

In a further embodiment, the rainwater harvesting system comprises a plurality o? mfhwitef storage tanks, whereby each of the plurality of the rainwater storage tanks;Is pppstmcted at substantially the same height over ground. in a ;fdt^M:'imb.bditeini; She rdf the piOraiity of rainwater storage tanks isa master pinwstef §tsrsg© tank and the remaining rainwater storage tanks in the plurality of rainwater storage tanks are slave rainwater storage tanks; whereby, the: Steve rainwater storage tanks all feed into the master rainwater storage tank.

In a further embodiment,: the master rainwater storage fan|: supplies the: rainwater into the rainwater treatment assembly so that the rainwater is feated to become treated water. in a further emhodimeht, the master ipiowafer storage tank and the remaining rainwater storage tahKe to the plurality pf rainwater storage tanks are connected in series such that-all but one pf the.· in the plurality of; rainwater storage; tanks: feed into another pf the remaining: rainwater afpraio tanks in the plurality of rainwater storage tanks, and one of the remaining rainwater storage tanks ;ih the plurality of rainwater storage tanks feeds into the master rainwater storage; tank. in a further embodiment, the master rainwater storage tank and the remaining rainwater storage tanks in the plurality of rainwater storage tanks are connected In parallel such that all of the remaining rainwater storage tanks In the plurality of rainwater sfeteiptenks fepiiciltepfiyilhtq the master rainwater sigra$S:: tank;. I is envisageo that all of the plurality of the rainwater storage tanks witl bo located Ovenipund. By connecting apluraiiiy of rainwater storage tanks together, a targe capacity rainwater harvesting system can be created and scaled in a relatively easy fashion.

Sn a further embodimenf where the plurality of rainwater storage tanks are connected in series, it is foreseen to supply the outiected rainwater to the iast rainwater sforage tank, which is furthest from the master rainwater storage tank so as to ensure that the collected rainwater Mil pass through ail of the plurality of tllhwater storage tanks. This will reduce the possibility ofsfagnant water forming in the piursisfy of rainwater storage tanks,

Building the rainwater storage tank housing over ground and from modular pieces feoilitaiei a lower costs :irtekilatiOp,.:;Viiihtdh;: makes the rainwater harvesting system of the present: invention more economically viable for interested customers, users, investors and/or homeowners.

Detailed Description of Embodiments

The invention will he more cieariy understood from the following descnoliOh of some embodiments thereof, given by way of oyample only, with reference to the accompanying drawings, in which:

Figured :ΐό:a diagrammatic view of aihousehoid utilising a minwater harvesting; System Of the present! n von lion·

Figure 2 is a partiiily iiiWhrough perspective view d a wafer storage tank used in the rainwater harvesting system of trie present: Invention, and.

Figure 3 is a diagrammatic view of a piping network as is used ih the iaioWater hah/esting system of the present invention.

Referring tp Figure 1, thereto provided a rainwater harvesting system indicated generally % reference numeral 100- The rainwater harvesting system 100 is connected to a building indicated: generally by reference numeral 200. The building 200 comprises walls 202 supporting a roof 204. Rainwater is cpliected gif the roof |04 and directed: by a gutter 208 into a down pipe SOS In the standard fashion, in place of allowing the rainwater to run-off to a sewage systernfrom the downpipe 208. the rainwater 208 is passed to the rainwater harvesldp system 100 via a rainwater collector, The rainwater is passed through a rainwater supply p!pe 302 io a rainwater storage tank housing 300 of the rainwater habteteing aptem 1:¾ A treated water Supply line 304 runs from the rainwater storage tank housihg 300 of the rainwater harvesting system 100 back to the building 200, where: IN#; feesfit ϋί$τ· is preferably by way of a standard water tank as is found in many buildings.

Turing to Figure 2, wherein like parts previousiy described have been assigned toe same: reference numerals, there is shewn the rainwater storage tank housing Indicated generally by reference numeral lid. The rainwater storage tank housing 300 comprises an outer· protective sheeting 500. 502* 504 and an intermediate insulating layer 600, 602, 604, 606. 608 between the outer protective sheeting 500;, 502* §04 and toe rainwater storage tank indicated generally by; reference numerals 400. The Cuter protective sheeting 500, 502, 504 is preferably a sheet metal, but may be a dasttes materia! alternatively. The outer protective sheeting 500. 502, 604 will be substantially pianamioed in order to tedoce the footprint of the rainwater storage tank housing 300; however, it will be readily appreciated that cermgated metal sheets and corrugated plastics sheets may also fee· used. The intermediate insulating layer 600, 602, 604, 606, 608 is approximately 50mm in thickness so as to Insulate the rainwater storage lank 400 from extreme cold weather which could otherwise freeze: rainwater stored in toe rainwater storage tank 400. The outer protective sheeting 600; 502, 504 is connected to the intermediate insulating layer 600, 602, 604, 606, 808* preferably off-site in a workshop, and the assembly of the outer protective Sheeting 50¾ 502, 504 and the intermediate insulating layer 600. 602, 604, 606. 608 provides a rigidity to the outer protective sheeting 500. 502. 504 which; will be understood to be relatively thin in comparison to the thickness: of the intermediate insulating layer 600, 602, 604, 606, 608. As can be seen from Figure 3, outer pmtobtivesheeting 500, 502, 504 is roadeup of a rear protective sheet 500, a front protective sheet 502 and a Side protective sheet 504. it wiif be understood that a second side protective sheet is not; shown and a roof Sheet is aiso not shown. The intermediate insulating layer 600, 602, 604, 606, 608 is made up of a rear intermediate insulating layer 600, a front intermediate insulating layer 602, a first side tntelmedilte insulating iayer 804, a second Side intermediate insulating layer 606, and, a top intermediate insulating iayer 808. As dismissed, it is envisaged in a preferred embodiment of the present invention that the respective rear, front,, side an#! top sheets/layers of the outer protective sheeting 500, 502, 504 -and the intermediate insulating layer 600, 602, 604, 606, 608 wilt be connected together offsite, perhaps in a workshop, and brought to site as modular panel pieces of the rainwater storage tapis housing 300. These modular panel pieces of the rainwater sfpragestanfe houslni 300 can then be relatively thickly joined together on-slteto form the raid water storage tank housing 300. The modular pine! pieces of the; rainwater storage tank housing 300 are foreseen to be installed on top of a pre-cast epncrete;; plinth. The dimensions of the rainwater storage tanfruhousing 300 are preterably within thp fbllpwing ranges: 1500mm to 2500mm in length. 1800mm to 2750mm in height at the front, 1900mm to 2860mm in height at the rear, and, 600mm to 900mm in depihv In a particularly preferred; embodiment:, the dimensions of the rainwater storage tank housing 800 ere substantially: 1980mm In length. 2235mm lh; height at the front, 2335mm in beigM at the rear, and, TlOmm in depth, Ida :;pteduiSdy preferred embodiment, the; modular panel pieces may be eppfexfmatejp; 52mm Id depth (a 2mm outer pmfeetive layer and a 60mm: intermediate!1 testeafteg layer| 1150mm in length, and, 2350mm in height. Of course, various sizes may be used, but the various detailed above sizes of the particularly preferred; embodiments! are ait seen to be most preferable.

It will be appreciated teat; the roofs# the mjnwater itetege tank housing 300 will have a slight incline due to the height differential from the front; of the rainwater storage tank housing 300 td the rear of thetetFrwater storage lank housing 300. Rainwater may thus be collected off of the roof of the rainwater storage tank housing 300 also. Due to the dimensions of the rainwater sterage tank housing 300, tee modular pieces of the rainwater storage: tank housing: 3Q0 will be able to be passed: through a Mandafd! door open! ng in e buildihg.

The rainwater storage tank housing 300 houses the rainwater storage tank400 and® rainwater treatment assembly (not shown). The rainwater treatment assembly may comprise ultra-violet lights, aerators* filters and the like as are well known in the rainwater treatment industry. The control units for controlling the operation of the rainwater harvesting system 100, and gauges for monitoring the Operation of the rainwater harvesting system 100 would also form part of the rainwater treatment assembly and be housed within the rainwater storage tank housing 300. It will be appreciated: that In an embodiment: of the present Invention where a plurality of minwater ^brage: tanks 400 are connected together in order to increase the rainwater Storing capacity of the rainwater harvesting system ISO, one of the plurality of mlnwater stpmge tanks 400 will be designated a master rainwater storage tank #0 and the rainwater treatment assembly will be housed within the same rainwater storage tank housing 300 as the master rainwater storage tank 400. The remaining rainwater sferage tanks 400 In the plurality of rainwater storage tanka: 401 will be designatesl as stave rainwater storage tanks 400 are will feed into the master rainwater storage tank 400 through a serial connection or a parallel connection. St will be understood that the remaining rainwater storage tanks 400 in the plurality of rainwater storage tanks 400 will each have a rainwater storage tank housing 300 (or multiple tanks may be: housed inside » single housing) but the minwafer treatment assembly does not heed # be installed inside the rainwater storage tank; housings 300 used for the remaining rainwater storage tanks 400 in the plurality of rainwater storage tanks 400. Only one rainwater itreetment assembly is required in the rainwater harvesting system 100. even where there is a plurality of rainwater storage tanks 400 used in the rainwater harvesting system 100. in yet a further preferred embodiment,: Ihetralnwaief storage tank #§,:;i$Hel^-|ormed of modular pieces and comprises a top: sferage tank parse! 402, e front storage tatfr panel 404 and a side storage tank panel: 400> The rear storage tank panel, the bottom storage tank panel and the other side storage tank panel are not shown, in a preferred embodiment, the rainwater storage tank 400 will hold approximately 1,000 litres of rainwater. As course, other sizes of rainwater storage tank may be used depending o" the wafer supply requirements of the building. As discussed supra, the cost of using a modular rainwater storage tank 400 is relatively high for the benefits achieved and as It Is envisaged: to use a 1,000 litre capacity rainwater storage: tank 400; it is likely that the rainwater storage tank 400 will be a ©rte-pooe moulded tank, which is not built from any modular pieces.

The purpose of providing the rainwater storage tank housing 300 in modular pieces is to SidS# the rainwater storage tank housing 300 to be brought through a standard sized doorway. Thus, if; there Is no external access to a site, suohias;i when; the site is a seer garden of a terraced house, the rainwater storage tank housing 300 is brought through the house m modular pieces and subsequently assembled on-site. As the: teinwater stefegetenk 400 is insulated by the intermediate insulating layer 600, 602, 604, 606, 606, the rainwater storage tank housing 300 and die rainwater storage tank 400 wilt fee constructed and installed in an over-ground location, obviating any need ter ground ekdaMtiohlterlte. A service hatch (not shown) may be provided on a front or side pane! of the rainwater storage tank housing Ofp so as to aifow easy access for a technician to service and: repair the control pads and rainwater treatment assembly parts in the rainwater harvesting system 100.

Turning now to Figure i; the pipework layout: and: component:' parte used in a preferred ernbodirn enlif the present i nvention IS; shown,

An existing gutter 206 on a building (not shown) feeds a downpipe 2Qf| fbe downptpe 208 enters a rainwater collector m the form of a hopper head 700. The hopper head 700 may preferably comprise a screen filter to remove: targe particles of debris and rubbish from the rainwater. The collected rainwater leaves the hopper head 700 and flows through a rainwater supply pipe 302. A further particle fitter 702 is provided along the rainwater supply pipe 302 to remove any unwanted small particles of debris from the rainwater travelling through the rainwater supply pipe 302. The prticie filter size may be selectee as tequired. A 5 micron fitter size may be used, for ekampte.

The collected, filtered rainwater than passes tnrough a rainwater discharge pipe 704 into the rainwater storage tank 400, overitow pipe 70S projects from adjacent the top of the mihwatef storage tank 40|< Λ exterior rainwater tev©t Indicator 70S is also; provided. The level 712 of the pinwafer in the rainwater storage tank 400 will vary depending on the supply of collected rainwater to the; rainwater storage tank 400 and the demand of the building for treated wafer, As the building demands treated water (usually via a hsiibock M £ water tank 730:i:: rainwater will be pumped term the pinwafer storage tank 400, treated by the rainwater treatment assembly and provided to the building: along the treated water supply line 304c if fee level 712 of the rainwater in the rainwater storage tank 400 drops below 100; litres in a 1,000 litre rainwater storage tank 400, then the rainwater harvesting system 100 will not permit any further rainwater to be drawn from the rainwater storage tank 400. This is to prevent the rainwater storage tank 400 from being dried out. A rainwater level sensor 710 is used to idbhtrplThe: operation:: Ot the pump 714. if there Is a demand for wafer from the building; (fbf example,; by way of a stopcock on a water tank in the building) then the pump 714 will be operated id pump rainwater out of the rainwater storage tank 400 through e filtering teat valve 716, If the level 712 of rainwater in the rainwater storage tank 400 has dropped below a preset level, then the pump 714 may not be allowed to operate, even If there is a demand for water from the household. The pump 714 may only be permitted to operate once the; level 712 of rainwater in the rainwater storage tank 400 has increased beyond a predetermined; level . The preset level and the predetermined level maybeset at different amounts. For example.fee preset level for shutting down; the pump: 714 may he 100 litres, but the predetermined;: level for making the pimp; 714 operational again may be 250 litres. It will be appreciated that the pump 714 wit be a pressure activated pump, such feat the pump; 714 will become operational and attempt to pump water when a pressure drop is sensed;; however, as explained above, the pump 714 msy be prohibited from operating (even when a pressure drop has been detected) if the level 712 of rainwater in the rainwater storage tank 400 ss below o predetermined level, for example a level representing 100 litres; of rainwater;. The pump 714 wilt preferably create a pressure of appmximaielf ifcf id lite tteiW water supply line 304.

An isolating valve 71|; is provided between the pump 714 and the rainwater treatment assembly 722. An external -tap720 is provided to allow non-treated wafer to be taken out of the rainwater harvesting system.. This could be used as a gardening tap, for example and: may be ^Situated on a side of the rainwater storage tank hhusih^.

The rainwater is pumped out of the rainwater Storage tank 400 and through tM rainwater treatment assembly 722. As described: iSiove·, the rainwater feitment assembly 722 may da designed m. treat and pui%Ti8if^ie.r:.$o as to pmbueelpetelie' treated water or non-potable treated water of yarying duality depending on the re|pteteehte and intended use of tire treated water, pliers, aerators and ultra-violet lights* as ere all well-known for use in the treatment of rainwater, may h@ provided in the rainwater ireatmenfassembiy 722 and will not be discussed further her©.

Treated water ;s feed: ou* of the rainwater treatment assembly 722: and: a freated; water pressure gauge: 724 will display the pressure of the flowing treated water, A pressure sensor 72i is elSs; provided on the treated water supply line 304. If there is op flow on the treated: wafer supply line 304 andlthe building has a demand for watery then a melh: Water supply solenoid is used to open up a flow path for main water!© be suppited to the: building. When there is a demand for water from the building, the pump 714 W$ pump as much rainwater through the rainwatertreatment assembly as is possible before shutting down,; the treated water will be pumped out of a treated Water discharge via a treated water balicock 728 Into the Water tank 730 of the hulteihg, it will be appreciated that in alternative embodiments a water tank may not:: he usedand the treated watermaybe discharged directly out of a tap or the like. A serrate Mltedck 738 is used for the mains water supply The ballcocks 728,738 will cause: a demand for waferfromthe building, which the rainwater supply will attempt to fulfil. But if the rainwater suppiy is Insufficient, due to a lack of enough rainwater in the rainwater storage: tank 400, or a problem with the pump 714 or the rainwater treatment assembly 772, then the pressure sensor 726 on the treated water supply line :304 will detect tee lack of sufficient supply and use the mains water supply as a back-up.

Once the majority of the heated water has been pumped into the water tenk 730, tee pressure In the treated water supply line 304 will drop. The pressure sensor 726 will transmit a control signal: to the mains water supply solenoid 732. per example, when tee pressure sensor f26 sensee;s sufficient flow of treated water in the treated water supply hne 304, the pressure sensor will communicate a control signal to the: mains watersuppiy solenoid 732 in order to switch, dr::ensufe that, the mains water supply solenoid 732 in a dosed position so M Id prohibit mains water from a mate water supply 210 from being supplied to the building If the pressure sensor 726 senses as insufficient flow of treated water in the treated water supply line 304, the: pressure: Sensor 726 will communicate a control signal to the mates water supply solenoid 732 in order to switch: the mates'water'Supply732 In an open positioned as to permit mains water from a mains water supply 210 to be supplied to the building. The main water flows through the teaihs Water supply solenoid 732 (when it is in lie Oped position) and flows tlteugh a mates water supply line 734 to a main waterdtsoharge into the wafer tank:7¾ A main water gauge 736 is fitted on the mains water supply line 734 to display the: pressure of the main water supply 210, An isolating valve 740 is provided for mafriterterib© purposes. A by-pass valve 742 I# also prdvlded: to al!ow a mains νϋ^ίϋ^ί'·to he opened ih the event of a failure of the mam water supply solenoid 73¾ The mates:'wafer supply 211 sets as a back-up to the rainwater Supply Ihithis·'way;

The terms '‘comprise'' and Include1', and any variations thereof required for grammatical masons, am to be considered as interchangeable and accorded the widest pOSSfie interptetetion.

It wiM ibe understood that the components shewn in any of the drawings are not necessarily dfewn to scale, and, tike parts shown in several drawings are designated the same reference numerals.

It will :he further understood that features hem any of the embodiments may be combtepd with alternative described embodiments, even if suoh a combination is not explicitly recited hereinbefore but Would be understood to be technically feasible by the person skilled in the art.

The invention is not limited to the embodiments hereinbefore described which may be varied ;n both construction and detail

Claims (14)

  1. mjmm % Amimmtm harvesting system for a building; the rainwater harvesting system ipmpnsing a rainwater collector,·: a rainwater storage tank, aimlhwaiar treatment: assembly and a treated water1 supply line; the rainwater collector being suitable toniadaohment *φ#ν $l$tih§i: gu^erfb?: the building; wherein;: the rainwater storage tank is housed within: a rainwater storage tank housing which: is assarhlied on-site and Is constructed and located overground, fie rainwater collector supplying collected rainwater to the rainwater storage tank, the rainwater storage tank: storing the rainwater until there as a demand for thewater fromthe building; the rainwater storage tank supplying the rainwater into the rainwater treatment assembly so that the rainwater is treated to become treated water;: and; the treated: water is supplied to the treated water supply line in order to povide the treated.watering I, Λ rainwater harvesting system for a building as claimed in claim %. wherein, the rainwater storage tank housing is assembled Pn-site using modular pieces; whereby the modular pieces Of the rainwater storage tank housing have been prepared off-site in a workshop, :3. A rpinwater harvesting system for a building as claimed: th Claim 2,: Wherein, the: modular pieces of the rainwater storage tank: houslhiiare dimensioned eg aslib be able to pass through a standard door:opening. '4i. A minwafer harvesting system for a building as claimed in claim 2, whemih,:. the modular pieces of the rainwater storage tank housing are dimensioned; sp as to be able to pass: through a rectangular opening having a width ibafween 750mm and QSGmnrp add, a height between 19G0mm and 2400mm Bt M· rainwater harvesting system for a building; as claimed m any: of ihe preceding claims,:: Wherein, the building is connected to a mains water1 supply and the rainwater harvesting system comprises a mains water suppiy solenoid which can be switched between open and dosed positions In order to permit: or prohibl mains water from being supplied to the building from the miihWatersuppy.
  2. 6. S rainwater harvesting; system for a building as claimed in claim 5, wherein, the mains wafer supply solenoid is controlled by a pressure sensor Installed oh the treated water supply line.
  3. 7. A rainwater harvesting system for a building as claimed in ciaim 6, wherein, when the pressure sensor seises: a sufficient flow of treated water in the treated water suppiy line, the pressure sensor wiii communicate a control signal to the mains water supply solenoid in order to place the mains water supply soienoid in Its closed position so as to prohibit mains water boot being supplied to the building.
  4. 8., A rainwater harvesting system for a building as claimed in claim 6, wherein, when; the pressure sensor senses an insufficient flow of treated water in the treated; water suppiy ihe, the pressure.....sensor wit; communicate a control Signal to the mains water supply soienoid in order to place the mains water suppiy soienoid in its open position so ae ;to permit mains water to he; supplied to the building, 9 A rainwater harvesting system for a buMing as claimed in any preceding claims.: whereim the rainwafer ireatm:tpf assembly comprises an in-line Ultra-violet light to irradiate the rainwater.
  5. 10. A rainwater harvesting system for a building as claimed:: in any preceding: claims, wherein, the rainwater treatnjfpl!': -©ctstprlia^ a filter to remove unwanted particles from the mihwater.
  6. 11. A rainwater harvesting system for a building as claimed In any preceding claims, wherein, the rainwater treatment assembly comprises an In-line aerator to add ozone to lie rainwater.
  7. 12. A rainwater harvesting system for a building as; claimed in any preceding claims, wherein, the rainwater collector comprises a hopper head.
  8. 13. A rainwater harvesting system for a building as claimed in claim 12, whereip:r the hopper head comprises: an inlet filter. ί:4ί>·. Jr rainwater1 harvesting system -for a bOMing as Claimed in any preceding 'dsime,. wherein,, the:: rainwater storage ::tank housing comprises an enter frpiectlye sheeting and an Intermediate ipsufalng layer between: the outer protective sheeting and the rainwater storage tap. 15. A; rainwater .haryeeln0:: system for a:: luiiding ρ$ί claimed In claim 14, wherein, theoufer: pnyteetlye sheeting Is -
  9. 16. A rainwater harvesting systemfor a building as claimed in claims 14 or 15, wherein, the intermediate insulating layer is approximately 50mm In thickness so as to Insulate the rainwater storage tank and also provide a rigidity to the outer protective sheeing,
  10. 17. A rainwater haryesihg: system for a building as claimed in any preceding ciasms, wherein, the rainwater storage tank can hold approximately a max! mum of 1,0001. of liquid.
    16. A rainwater harvesting system for a building as claimed in any preceding claims:*;· Wherein,. the rainwater harvesting system Emprises a plurality of rainwater isljraga tanks*: whereby each of the plurality or the rainwater btamgerfsnks· is constructed at substantially the same: heightpver ground
  11. 19. A rainwater harvesting: System for a: building as claimed in claim 18, wherein, one COhe: plurality of irsihwater storage: taniies:is a master rainwater storage tank and: the 'remaining rainwater storage tanks so the plurality of rainwater storage taliks are slave rainwater storage tanks: whereby, the slave rainwater storage tanks all feed into the master rainwater storage laA
  12. 20. A rainwater harvesting system for a building as claimed in claim 19, Wherein, the -master rainwater storage tank supplies the iainwater into: the rainwater treatment assembly so that the rainwater Is treated to become treated water,
  13. 21, A rainwater harviSting system for a building as claimed in claims 19 or 20, wherein, the master rainwater storage tank and the remaining rainwater storage tanks in the plurality of rainwater storage tanks are connected in series such that all but ohe of the remaining rainwater storage tanks in the plufiiify of rainwater storage tanks feed into another of the remaining minwater storage tanks in the plurality of rainwater storage tanks, and one of the rernaiping rainwater storage tanks in the plurality of rainwater storage tanks leads into the master rainwater storage tank.
  14. 22, A rainwater harvesting system for a building as claimed in claims 19 or 20, wheresn, the master rainwater storage tank and the remaining rainwater storage tanks in the plurality of rainwater storage tanks are connected: lb parallel such that ail of the remaining rainwater storage tanks in the plurality of rainwater storage: tanks: feed directly into the master rainwater storage lank.
GB1620967.8A 2016-12-09 2016-12-09 A rainwater harvesting system Pending GB2557590A (en)

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Application Number Priority Date Filing Date Title
GB1620967.8A GB2557590A (en) 2016-12-09 2016-12-09 A rainwater harvesting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1620967.8A GB2557590A (en) 2016-12-09 2016-12-09 A rainwater harvesting system

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GB2557590A true GB2557590A (en) 2018-06-27

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06240712A (en) * 1993-02-23 1994-08-30 Matsushita Electric Works Ltd Rainwater utilization device
JPH07229171A (en) * 1994-02-16 1995-08-29 Minoru Kubota Method for recovering water, and device therefor
DE29606087U1 (en) * 1996-04-02 1996-06-27 Maul Karlernst Eco Water Resources
GB2304780A (en) * 1995-08-29 1997-03-26 Stephen Arthur Bannocks Water recirculation system and storage tank for use therein
KR20130112150A (en) * 2012-04-03 2013-10-14 금오공과대학교 산학협력단 The rainwater reuse system in a structure
KR20160043342A (en) * 2014-10-13 2016-04-21 주식회사 파워건축디자인 Removable assembly house

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06240712A (en) * 1993-02-23 1994-08-30 Matsushita Electric Works Ltd Rainwater utilization device
JPH07229171A (en) * 1994-02-16 1995-08-29 Minoru Kubota Method for recovering water, and device therefor
GB2304780A (en) * 1995-08-29 1997-03-26 Stephen Arthur Bannocks Water recirculation system and storage tank for use therein
DE29606087U1 (en) * 1996-04-02 1996-06-27 Maul Karlernst Eco Water Resources
KR20130112150A (en) * 2012-04-03 2013-10-14 금오공과대학교 산학협력단 The rainwater reuse system in a structure
KR20160043342A (en) * 2014-10-13 2016-04-21 주식회사 파워건축디자인 Removable assembly house

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