JP2021521360A - Self-disinfecting water trap - Google Patents

Abstract

The present invention relates to a self-disinfecting water trap for use in a washbasin with a drain with a housing having a top and bottom defining an internal space adapted to maintain pooled water.

Description

The present invention relates to, for example, a self-sterilizing water trap for use in a washbasin in a hospital facility. Furthermore, the present invention relates to a method of disinfecting water from a washbasin, such as a washbasin in a hospital facility. The present invention also relates to the use of such self-sterilizing water traps. In addition, the washbasin system is described and claimed.

Drains, especially washbasin water traps, are some of the most polluted areas in homes, especially hospitals. Such water traps are considered a serious source of pollution, especially in hospitals, infecting patients with multidrug-resistant bacteria.

We recognized the need to improve the environment around washbasins and sinks in hospital facilities, especially in hospital rooms and toilets used by hospital patients, staff and visitors / relatives. Similar needs exist for, but not limited to, ordinary homes and public places with washrooms.

The present invention relates to a self-sterilizing water trap for use in a washbasin with a drain with a housing having a top and bottom defining an internal space adapted to maintain pooled water.
(I) The upper part has a first opening configured to be liquid-tightly engaged with the drainage port of the washbasin via a hollow inlet pipe, and a hollow outlet for draining wastewater. It has a second opening configured to engage the pipe in a liquidtight manner.
(Ii) The bottom is liquid-tightly adapted to receive and maintain a UVC light source, which radiates pooled water and the entire interior space during operation.

In one embodiment, the UVC light source is adapted to radiate all pool water and all interior space.

In a further embodiment, the self-disinfecting water trap of the present invention comprises a hollow inlet pipe having a first end both open and a second end opposite, the first end of which. It extends into the interior space of the housing and is adapted to extend below the second opening at the top, the second end being configured to engage the washbasin drain in a liquid-tight manner.

In yet another embodiment, the self-disinfecting water trap of the present invention comprises a hollow outlet pipe having a first end both open and a second end on the opposite side, the first end. Extends into the second opening at the top and the second end is adapted to drain wastewater.

In a further embodiment, the self-sterilizing water trap of the present invention comprises a UVC light source. Preferably, the UVC light source is adapted to provide UVC light at 254 nm. Due to limitations, it is preferred to have one UVC lamp that provides UVC light at 254 nm, but there may be two or three UVC lamps. Preferably, in order to provide the most effective UVC light source, the UVC lamp is located in the center of the bottom of the housing.

In yet another embodiment, the bottom is adapted to accept the UVC light source and to receive the UVC light source through one opening configured to keep the UVC light source liquidtight.

In a further embodiment, the bottom is adapted to receive the UVC light source through two opposing openings configured to both receive the UVC light source and keep the UVC light source liquidtight.

In yet another embodiment, the UVC light source is coated with a nanocover that is not absorbed by UVC light.

In a further embodiment, all parts of the water trap are made of an alloy, for example a metal such as brass, and optionally chrome plated.

In yet another embodiment, all inner portions (surfaces) of the water trap are smooth to reduce biofilm formation.

In a further embodiment, all inner parts of the water trap are radiated by a UVC light source.

In yet another embodiment, the housing is substantially cylindrical.

In a further embodiment, the top and bottom are removable and liquidtightly connectable.

In yet another embodiment, the bottom comprises a removable lid or plug adapted to be liquidtightly connected to remove pooled water.

In a further aspect, the present invention is a method of disinfecting water from a wash basin having a drain, providing a self-disinfecting water trap according to any one of the present invention and the above embodiments, in which the water trap is used in the wash basin. It relates to a method including connecting to a drain and adapting an outlet pipe for draining wastewater.

In yet another aspect, the invention relates to the use of a self-disinfecting water trap of any one of the present invention and the above embodiments to reduce microorganisms in washbasin drains and water traps.

In a further aspect, the present invention is a washbasin system having a washbasin and a drain, including (a) a self-sterilizing water trap according to any one of the present invention and the above embodiments, and (b) the drain. The inlet pipe is made of a metal such as an alloy and is smooth and has an inner surface adapted to be exposed to UVC light from a water trap. With respect to the washbasin system.

In one embodiment, the drain is built into the wash basin and comprises a strainer element adapted to receive a plug for accommodating water in the wash basin, the strainer element having multiple openings for water to pass through. Has a part. In a further embodiment, the strainer openings are adapted to efficiently remove water from the wash basin and reduce light from the UVC light source by at least 30%, eg, at least 50%.

Further objects and advantages of the present invention will become apparent from the following description and claims.

It is a figure which shows the water trap (10) of this invention which has a top (14) and a bottom (16) and an internal space (not shown). It is a figure which shows the water trap (40) which is the same as FIG. 1 seen from the side where the 2nd opening (44) of the upper part (42) can be seen. It is a figure which shows the same water trap (40) as FIG. 2 seen as the cross section along the line AA. It is a figure which shows the same water trap (40) as FIG. 2 seen as the cross section along the line BB which looked at the bottom from the top. It is a figure which shows the different shape of one Embodiment of the water trap (80) which has a top (84) and a bottom (96) and an interior space (not shown). It is a figure which shows the same water trap (80) as FIG. 5 seen as a cross section along line CC. It is a figure which shows the same water trap (80) as FIG. 5 seen as the cross section along the line DD. FIG. 5 shows a strainer element (110) having a top (112) and a contralateral bottom (114), the bottom being an opening for engaging a water trap and the top (112) being water. Includes several small openings (122, 124, 126) for exiting the washbasin and entering the water trap. It is a figure which shows the strainer element (110) of FIG. 8 seen from the upper part.

Studies on the effectiveness of ultraviolet C (UVC) light to decontaminate water traps have been conducted in hospital facilities. This closed study showed a very clear and effective decontamination of water traps, and the reduction of bacterial counts was very effective. Studies have also shown that removal of the water traps of the present invention leads to rapid contamination. The present invention relates to a water trap device that is self-sterilizing and can be used in sanitary facilities. The water trap device of the present invention efficiently removes microorganisms including bacteria by the specific structure of the water trap combined with the location of the UVC light source in the water trap. UVC photodecontamination of water traps may be a viable aid to prevent the spread of multi-resistant aquatic bacteria from washbasins to immunocompromised patients.

The present invention provides these advantages with the solutions described.

The present invention relates to a self-sterilizing water trap for use in a washbasin with a drain. Wash basins are found not only in residences but also in public places such as dressing rooms / toilets, but also in hospitals. In hospitals, pollution has a great impact on all areas of the hospital.

The water trap of the present invention comprises a housing having a top and a bottom defining an internal space adapted to maintain pooled water, the top and bottom may be in the form of two parts, or 1 It may be viewed as one housing, the top and bottom simply indicating which half of the housing is referenced.

The upper part has a first opening configured to be liquidtightly engaged with the drain of the washbasin. It is clear to those skilled in the art that, for example, the use of threaded connections is optional to make such connections liquidtight, but other solutions are possible. In some cases, depending on the location of the upper opening of the water trap and the distance from the drain of the wash basin, a connecting pipe having a length corresponding to the distance is required. The connecting pipe is a hollow inlet pipe made of a metal such as an alloy.

The upper part also has a second opening configured to be liquidtightly engaged with a hollow outlet pipe for draining wastewater, typically such a second opening is the upper part. Located on the side of the, so that the second opening is easily connected to another pipe that directs the wastewater to a different location, such as a sewer.

The bottom is adapted to accept the UVC light source and keep the UVC light source liquid tight, and the UVC light source radiates pool water and the entire interior space during operation. The UVC light source is adapted to radiate all pool water and all interior space. Because the UVC light source is located within a defined space extending into the bottom, the UVC light radiates all internal space of the water trap, including the hollow inlet pipe, when the UVC light source is maintained. Typically, a UVC light source, when mounted and used, extends with a bottom inner wall formed on the opposite inner wall of the bottom. Preferably, the UVC light source is adapted to provide UVC light at 254 nm, as experiments have shown that effectiveness is significantly reduced outside this wavelength. Due to limitations, it is preferred to have one UVC lamp that provides UVC light at 254 nm, but there may be two or three UVC lamps. Preferably, in order to provide the most effective UVC light source, the UVC lamp is located in the center of the bottom of the housing. Therefore, the UVC lamp is centrally located and extends over the entire distance from one inner wall to the opposite inner wall. The bottom can be adapted to accept the UVC light source and accept the UVC light source through one opening configured to keep the UVC light source liquidtight, but makes the water trap more user friendly and of the washbasin. To facilitate adaptation to different situations and locations, the bottom is adapted to accept the UVC light source through two opposing openings configured to both accept the UVC light source and keep the UVC light source liquidtight. Will be done.

The UVC lamp is covered with glass, also called a sleeve that protects the UVC source, and to further protect the glass, nanocovers are preferably applied to the entire surface area of the glass. Preferably, the UVC light source is coated with a nanocover that is not absorbed by UVC light. Nanocovers are used to reduce the buildup of calcium on the outer portion of the glass that makes up the UVC lamp. Nanocover avoids water and avoids water adhesion to the glass surface. Therefore, calcium cannot adhere to the nanocover, resulting in the formation of calcium and ensuring continuous and effective UVC light in the water trap. On a pure glass surface without nanocover, calcium carbonate is formed on the glass in the area where hard water is present, and the effect of UVC radiation may be reduced after long-term use.

Typically, the nanocover can be made of a mixture of hydrocarbons and silicon dioxide. SiO2 is chemically bonded to the glass surface. Nanocover is applied by spraying, but immersion and other application methods are possible. Nanocover coatings are applied to sleeve glass and the coating is evenly distributed on relatively thin glass, typically UVC lamps are used for air and water flow, breakage, leaks, temperature fluctuations, and environmental conditions. Protected by a 20.5 mm closed / dome-shaped quartz sleeve that protects against danger. The UVC light from the lamp has a wavelength of 254 nm and the nanocover does not absorb at this wavelength, so it does not affect the effectiveness of the UVC lamp.

Any hollow inlet pipe used in the first opening at the top is made of metal and can be adjusted when installed under the washbasin. For optimal function, the first end of the hollow inlet pipe avoids complexity during use, and for the water trap to function properly, the first end is the upper second opening. It needs to extend into the interior space of the housing so that it extends underneath the section.

The upper second opening typically comprises an outlet pipe that projects from the opening to a point where wastewater can be drained. Such a second pipe can be made of any material such as plastic or metal, but when the water trap of the present invention is made of metal, it is preferable that the upper inlet pipe is also made of metal. ..

As used herein, the term "metal" means any metal itself, or a metal mixture such as an alloy, typically brass. Optionally, metals such as brass are chrome plated.

Biofilm formation reduces biofilm formation as it can contribute to contamination of the inner space of the housing and various parts such as hollow inlet pipes extending from the first and second openings at the top. Therefore, it is preferable to smooth all the inner parts (surfaces) of the water trap.

Typically, the housing is substantially cylindrical. The top and bottom of the housing are removable and can be liquidtightly connectable, or the bottom is provided with a removable lid or plug adapted to be liquidtightly connected to remove pooled water. May be good. Such a lid or plug is placed on the lowest part of the bottom for easy and user-friendly removal of pooled water.

In a further aspect, the present invention is a method of disinfecting water from a wash basin having a drain, providing a self-disinfecting water trap according to any one of the present invention and the above embodiments, in which the water trap is used in the wash basin. It relates to a method including connecting to a drain and adapting an outlet pipe for draining wastewater. It should be understood that each of the above embodiments described in connection with the self-disinfecting water trap of the present invention is also intended to be an embodiment relating to the method of disinfecting water of the present invention.

In yet another aspect, the invention relates to the use of a self-disinfecting water trap of any one of the present invention and the above embodiments to reduce microorganisms in washbasin drains and water traps. It should be understood that each of the above embodiments described in connection with the self-disinfecting water trap of the present invention is also intended to be an embodiment relating to the use of the self-disinfecting water trap of the present invention.

In a further aspect, the present invention is a washbasin system having a washbasin and a drain, including (a) a self-sterilizing water trap according to any one of the present invention and the above embodiments, and (b) the drain. The inlet pipe is made of a metal such as an alloy and is smooth and has an inner surface adapted to be exposed to UVC light from a water trap. With respect to the washbasin system. It should be understood that each of the above embodiments described in connection with the self-disinfecting water trap of the present invention is also intended to be an embodiment of the wash basin system of the present invention.

The drain is typically built into the wash basin and features a strainer element adapted to receive a plug for accommodating water in the wash basin, the strainer element having multiple openings for water to pass through. Has a part. The openings in the strainer need to be sufficient to remove water from the wash basin during use, and at the same time, such openings also allow at least 30%, for example at least 40%, of the light from the UVC light source. It needs to be reduced by at least 50%, or at least 60%.

The present invention will then be described more fully with reference to the accompanying drawings illustrating typical embodiments of the water trap of the present invention.

These drawings are by no means limiting the scope of the invention and are intended only to guide those skilled in the art to better understand the invention.

FIG. 1 is a diagram showing a water trap (10) of the present invention having an upper part (14) and a lower part (16) and an internal space (not shown). The top and bottom constitute the housing (12). The upper portion (14) has a first opening (18) and a second opening (22), and the first opening (18) extends from the drain port of the wash basin or the wash basin. It is defined by a connecting element (20) that can be engaged with a connecting pipe such as a hollow inner tube (not shown). The second opening (22) is provided by a pipe connection (24) with a threaded inner portion (26) for liquidtight engagement with an extension pipe (not shown) for guiding wastewater to the sewer. It will be extended. At the bottom, two pipe extensions (30, 34) are located opposite each other, and the first pipe extension (30) has an opening (28) adapted to receive a UVC lamp. On the other side, the other pipe extension (34) has a similar opening (not shown) adapted to accept the UVC lamp. Therefore, in this embodiment, the UVC lamp may be inserted and mounted through both openings of the pipe extension (30, 34). The small connections (32, 36) are outlets for grounding during use.

FIG. 2 is a diagram showing a water trap (40) similar to FIG. 1 as viewed from the side where the second opening (44) of the upper portion (42) can be seen. The corresponding top (42) and bottom (46) are the same as in FIG. 1 (14 and 16). The top (52) of the top (42) is located on the opposite side of the bottom (54) of the bottom (46). At the bottom, two pipe extensions (48, 50) are located opposite each other, as also illustrated in FIG. 1, and the pipe extensions (48, 50) are adapted to accept UVC lamps. Has an opening (not shown). The small connections (56, 58) are outlets for grounding during use.

FIG. 3 is a diagram showing the same water trap (40) as in FIG. 2, which is seen as a cross section along lines AA. The top (52) has a threaded portion for engaging with the drain through an optional hollow inner pipe (not shown). The upper portion (42) has an extension pipe (62) having a second opening (44), and the interior space (66) is exemplified. Part (60) shows the opening of the bottom (46) where the UVC lamp is introduced for use during the operation of the water trap, which is also shown in the extension pipes (48, 50) in FIG. Has been done.

FIG. 4 is a diagram showing the same water trap (40) as in FIG. 2, which is seen as a cross section along the line BB when the bottom is viewed from the top. A cylindrical interior space (66) is shown, the bottom (46) surrounding the interior space (66), and the openings (68, 70) of the extension pipes (48, 50) opposite each other in the center. Located on the side. The openings are adapted to accept the UVC lamp and keep the UVC lamp liquidtight. The small connections (56, 58) are outlets for grounding during use.

FIG. 5 is a diagram showing different shapes of one embodiment of a water trap (80) having a top (84) and bottom (96) and an interior space (not shown). The top and bottom constitute the housing (92). The upper portion (84) has a first opening (82) and a second opening (86), and the first opening (82) extends from the drain port of the wash basin or the wash basin. It is defined by a connecting element that can engage the connecting pipe. The second opening (86) is a pipe connection (86) with a threaded inner portion (not shown) for liquidtight engagement with an extension pipe (not shown) for guiding wastewater to the sewer. ) Extends. At the bottom (96), one pipe extension (94) can be seen from the end of the UVC lamp insertion, which one pipe extension (94) is an opening adapted to receive the UVC lamp. (94). Therefore, in this embodiment, the UVC lamp may be inserted and mounted through only one opening. The top (84) and bottom (96) are exemplified at intervals so that the inner tube / pipe (88) can secure the liquidtight housing during use at the top (84) and bottom (84). It can be seen in the assembly between (96) and the engaging portion (90). The small connection (98) is an outlet for grounding during use.

FIG. 6 is a diagram showing the same water trap (80) as in FIG. 5, which is seen as a cross section along line CC. Here, the hollow inner tube or pipe (88) is viewed as extending from the upper opening (102) of the upper (84) to a location (104) below the upper second opening (not shown). be able to. The interior space is exemplified as (100), and at the bottom (96), the UVC lamp (94) is shown to be maintained at the bottom (96) of the housing (92). The opposite end (104) of the opening with the inserted UVC lamp (94) extends from the side of the bottom to accommodate the UVC lamp and secures and holds the UVC lamp during use.

FIG. 7 is a diagram showing the same water trap (80) as in FIG. 5, which is seen as a cross section along lines DD. As can be seen, the UVC lamp (94) is centrally located, extends from both sides of the bottom of the housing, and faces the interior space (100), as well as the pool water, and the water trap or water inside the housing (92). Ensure complete UVC exposure of parts of the trap system.

FIG. 8 is a diagram showing a strainer element (110) having a top (112) and a contralateral bottom (114), the bottom being an opening for engaging the water trap and the top (112). ) Includes several small openings (122, 124, 126) for water to exit the washbasin and enter the water trap. The upper part is a peripheral edge (not shown) and has an edge portion (120) adapted to fit into the drain of the washbasin. The inner space (118) defines a hollow space for water to flow when the washbasin is in use, and the strainer (110) provides a tube extension (not shown) from the top into the water trap. Separated by a defining wall (116).

FIG. 9 is a diagram showing the strainer element (110) of FIG. 8 as viewed from above. As illustrated in this embodiment, the top includes seven small openings (122, 124, 126, 130, 132, 134, 136) for water to exit the washbasin and enter the water trap. The upper part has an edge portion (120) which is a peripheral edge, and the inner line (128) of the peripheral edge is a small depression for guiding water to a small opening (122, 124, 126, 130, 132, 134, 136). Is illustrated.

All references, including publications, patent applications and patents cited herein, have been individually and specifically indicated so that each reference is incorporated by reference and is described herein in its entirety. To the same extent as the case, it is incorporated herein by reference.

All headings and subheadings are used herein for convenience only and should by no means be construed as limiting the invention.

Unless otherwise indicated herein, or as clearly contradictory to the context, any combination of the above elements in all possible variations thereof is included in the invention.

The description of a range of values herein is intended only to serve as a simplified way to individually reference each individual value within that range, unless otherwise indicated herein. , Each individual value is incorporated herein as they are individually described herein. Unless otherwise stated, all exact values provided herein represent corresponding approximations (eg, all exact exemplary values provided for a particular factor or measurement are as required. It can also be considered to provide corresponding approximate measurements that are changed by "about").

All methods described herein can be performed in any suitable order, unless otherwise indicated herein or where there is no apparent conflict in context.

The terms "a" and "an" and "the" and similar referents used in the context of describing the present invention are singular unless otherwise specified herein or as clearly contradicted by the context. It should be interpreted as inserting both the form and the plural. Therefore, "a" and "an" and "the" may mean at least one or more.

The use of any and all examples, or exemplary languages (eg, "etc.") provided herein is merely intended to better illustrate the invention and unless otherwise indicated. , The scope of the present invention is not limited. The language herein should not be construed as indicating that any element is essential to the practice of the present invention, unless explicitly stated.

Through the description when "selected from" or "selected from the group consisting of" is used, it also means all possible combinations of the terms mentioned, as well as each individual term.

The citations and incorporation of patent documents herein are for convenience only and do not reflect the validity, patentability, and / or exerciseability of such patent documents.

The description herein of any aspect or embodiment of the invention that uses terms such as "provide," "have," "contain," or "contain" with respect to one or more elements is described elsewhere. A similar aspect or practice of the invention that is "consisting of," "consisting of," or "substantially including" that particular element, unless otherwise noted, or as clearly contradictory to the context. A composition intended to provide support for a form (eg, a composition described herein as comprising a particular element is that element unless otherwise stated or apparently inconsistent in context. It should be understood that a composition consisting of is also described).

The features disclosed in the above description can be materials for realizing the present invention in its various forms, both separately and in any combination thereof.

The newly developed UV-C decontamination equipment for the experimental wash basin water traps (see FIGS. 1-9) was mounted on four separate wash basins (HygLab, 211, 103A and 200B).

Experimental design:
UV-C light was active in the two wash basins, but the two wash basins were used as controls without UV-C exposure (Part 1). After 8 weeks, the experiments were swapped, using the first UV-C active wash basin as a control and exposing the first control wash basin to UV-C light (Part 2), see Table 1.

Hygrab means the wash basin of the Institute of Hygiene, 211, 103A and 200B are the specific wash basins of various toilets in the hospital facility.

Sample collection and identification:
Swabs were collected weekly from the top and bottom of the washbasin tailpipe and grown on blood and lactose agar plates. Bacteria were semi-quantitatively quantified.

Water was collected weekly from water traps and subjected to 10-fold serial dilution to determine total bacterial count (CFU / mL).

Bacterial colonies were identified by MALDI-TOF MS technology.

Bacterial count (CFU / mL):
In both Part 1 and Part 2 of the experiment, a significant reduction in bacterial counts was observed within the first week with UV-C active water traps compared to control wash basins. In the UV-C active water trap of Part 2 of the experiment, the bacterial count was reduced by a factor of 105-106 (see Table 2).

Overall, significant differences in bacterial counts were observed between water traps exposed to UV-C light and control water traps during the experiment.

Within the first two weeks of Part 2 of the experiment, bacterial counts in the new control water traps increased significantly to levels similar to those of the control water traps in Part 1 of the experiment (see Table 2).

Species identified:
UV-C decontamination reduced the total number of various bacteria identified in water traps exposed to UV-C light (UV-C active = 5, control = 9).

After discontinuation of exposure to UV-C light, the total number of identified species increased.

Under UV-C light exposure, Pseudomonas aeruginosa and Gram-negative endosymbionts disappeared, but Stenotrophomonas maltophilia increased significantly.

Claims (22)

A self-sterilizing water trap for use in washbasins with drains with housings with tops and bottoms that define an interior space adapted to maintain pooled water.
(I) The upper part is provided with a first opening configured to be liquid-tightly engaged with the drain port of the wash basin via a hollow inlet pipe, and for draining wastewater. It has a hollow outlet pipe and a second opening configured to engage liquidtightly.
(Ii) The bottom is liquid-tightly adapted to receive and maintain a UVC light source, which radiates the pooled water and the entire interior space during operation.
Self-disinfecting water trap. The self-disinfecting water trap according to claim 1, wherein the UVC light source is adapted to radiate all the pooled water and all the interior spaces. It comprises the hollow inlet pipe having a first end both open and a second end on the opposite side, the first end extending into the interior space of the housing and the upper portion. 1 or 2, wherein the second end is adapted to extend below the second opening of the wash basin and is configured to be liquidtightly engaged with the drain of the wash basin. Described self-disinfecting water trap. It comprises the hollow outlet pipe having a first end both open and a second end on the opposite side, the first end extending into the second opening at the top. The self-disinfecting water trap according to any one of claims 1 to 3, wherein the second end is adapted to drain wastewater. The self-disinfecting water trap according to any one of claims 1 to 4, further comprising the UVC light source. The self-disinfecting water trap according to claim 5, wherein the UVC light source is adapted to provide UVC light at 254 nm. The self-disinfecting water trap according to claim 6, wherein the UVC light source is one UVC lamp that provides UVC light at 254 nm. The self-disinfecting water trap according to claim 7, wherein the UVC lamp is located in the center of the bottom of the housing. Any one of claims 1-8, wherein the bottom is adapted to receive the UVC light source and to receive the UVC light source through one opening configured to keep the UVC light source liquidtight. Self-disinfecting water trap described in. The bottom is adapted to receive the UVC light source through two opposing openings configured to both receive the UVC light source and keep the UVC light source liquidtight. The self-disinfecting water trap according to any one of the items. The self-disinfecting water trap according to any one of claims 5 to 10, wherein the UVC light source is coated with a nanocover that is not absorbed by the UVC light. The self-disinfecting water trap according to any one of claims 1 to 11, wherein all parts of the water trap are made of an alloy, for example a metal such as brass, and optionally chrome plated. The self-disinfecting water trap according to any one of claims 1 to 12, wherein all inner portions of the water trap are smooth to reduce biofilm formation. The self-disinfecting water trap according to any one of claims 5 to 13, wherein all the inner portions of the water trap are radiated by the UVC light source. The self-disinfecting water trap according to any one of claims 1 to 14, wherein the housing is substantially cylindrical. The self-disinfecting water trap according to any one of claims 1 to 15, wherein the upper portion and the lower portion are removable and liquid-tightly connectable. The self-disinfecting water trap according to any one of claims 1 to 16, wherein the bottom is provided with a removable lid or plug adapted to be liquidtightly connected to remove the pooled water. A method of disinfecting water from a wash basin having a drain port, wherein the self-disinfecting water trap according to any one of claims 1 to 17 is provided, and the water trap is connected to the drain port of the wash basin. A method comprising adapting the outlet pipe for draining wastewater. Use of the self-disinfecting water trap according to any one of claims 1 to 18, for reducing microorganisms in the drain and the water trap of the wash basin. A washbasin system having a washbasin and a drain, comprising (a) the self-disinfecting water trap according to any one of claims 1-18, (b) the drain is the hollow inlet pipe. The wash basin is made of metal and has an inner surface that is smooth and adapted to be exposed to the UVC light from the water trap. system. The drainage port comprises a strainer element incorporated into the wash basin and adapted to receive a plug for accommodating water in the wash basin, the strainer element having a plurality of openings for water to pass through. The wash basin according to claim 20. 21. The strainer, wherein the plurality of openings are adapted to efficiently remove water from the wash basin and reduce light from the UVC light source by at least 30%, eg, at least 50%. Washbasin.

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