US3095219A - Drain or vent pipe construction having means to allow lateral and longitudinal expansion - Google Patents

Drain or vent pipe construction having means to allow lateral and longitudinal expansion Download PDF

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US3095219A
US3095219A US743668A US74366858A US3095219A US 3095219 A US3095219 A US 3095219A US 743668 A US743668 A US 743668A US 74366858 A US74366858 A US 74366858A US 3095219 A US3095219 A US 3095219A
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extension
pipe
roof
drain
flange
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US743668A
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La Verne F Tutty
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Johns Manville Corp
Johns Manville
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Johns Manville
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
    • F16L5/02—Sealing
    • F16L5/10—Sealing by using sealing rings or sleeves only
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
    • E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/0404—Drainage on the roof surface
    • E04D13/0409—Drainage outlets, e.g. gullies
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
    • E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/0404—Drainage on the roof surface
    • E04D13/0409—Drainage outlets, e.g. gullies
    • E04D2013/0436—Drainage outlets, e.g. gullies with sealing means

Definitions

  • This invention relates to drain or vent pipe constructions; more specifically, it relates to vent or drain pipes having means provided therein to compensate for longitudinal and lateral expansion of the piping system r movements of the wall member, through which the pipe protrudes, due to load deflections.
  • One of the common forms for venting the plumbing system of a building or to provide for drainage of a flat or low pitched roof of the building is the provision of a stack which extends through the roof to the exterior.
  • the internal pipe system is vented, in the case of a vent pipe, by allowing the gases, vapors, etc., to pass through the vent pipe to the exterior; in the case of a drainage system, the roof is pitched slightly towards the drain pipe and the water is allowed to flow into a well adjacent the pipe and thence into the pipe and the drainage sewers.
  • the defects in these systems are that no provision is made for the continual longitudinal and lateral expansion of the piping system, and no provision is usually made for the deflections of the roof due to a changing load, as, for example, a snow load.
  • An object of this invention therefore is to provide a novel type of internal roof drain or vent pipe which provides for expansion of the piping system in both a lateral and longitudinal direction.
  • Another object of this invention is to provide a novel internal roof drain or vent pipe system wherein compensation is provided in the piping system for deflections of the roof due to changing loads on the roof.
  • Still another object of this invention is the provision of a drain or vent pipe for a plumbing system in a building and with novel means of support for that section of the pipe adjacent the roof.
  • the invention comprises an extension on a drain pipe or vent pipe in a building plumbing system whereby the extension is resiliently supported by the roof. Provision is made for longitudinal or vertical expansion of the extension and main pipe and for the lateral expansion of the extension and pipe. The arrangement provided also allows deflections of the roof clue to changing loads to occur without creating stresses in the roof adjacent the connections between the extension and the roof.
  • FIG. 1 is a cross-sectional view of a roof and the upper portion of a drain pipe or a venting system adjacent the roof;
  • FIG. 2 is a plan view of the system along section lines 22 of FIG. 1.
  • a drain pipe 1 extends vertically from within the building structure (not shown).
  • pipe 1 will hereinafter be described as a drain pipe; however, it is to be understood that the pipe 1 may be either a drain pipe or a vent pipe as the surrounding constructions for the two are basically the same.
  • the drain pipe or vent pipe is described as extending through a roof of a building; it is to be understood, however, that the pipe may extend through other wall structures.
  • the drain pipe may be attached to a building structure so that it will drain the floor of such a structure. Consequently,
  • Fitting 3 comprises a tubular extension 4 having at its upper portion a flange 5; a second extension 6 extends upwardly from the first extension 4 and flange 5 and is staggered slightly on the flange in order to receive internally the mating section 7 of the fitting.
  • Tubular portion 8 of this latter section 7 is encircled by the tubular extension 6 and has a flange 9 extending transversely from its upper edge; a gasket gland is placed between one of the edges of tubular portion 8 and flange 11 to seal the joint between the mating halves of the fitting.
  • gland 10 is compressed and extends inwardly thereby sealing the small gap between extension 15 and the fitting.
  • the gland is of the asbestos graphite type so that any expansion in the vertical direction of the drain pipe 1 or the extension 15 allows relative sliding movement in a vertical direction between the extension 15 on the one hand and the fitting 3, including elements 4, 7, and 10, on the other hand, and hence between the extension 15 and the pipe 1, while still maintaining a proper seal between the two.
  • Extension 15 comprises a main tubular body portion 16 having at its upper end a transverse well 17. The latter, at its upper portion, has a transverse flange 18 extending into the body of the roof. A cap 19 having perforations or ports 20 therein is placed upon the upper internal lip of the tubular body 16 and screens the water flowing from the roof into the well 17 and pipe 1. In the event that pipe 1 is a vent pipe, cap 19 may be omitted if so desired.
  • Extension 15 is supported in part by the tight seal between the fitting 3 and the extension 15 and also by a soft layer of insulation 31 supported from the roof deck by a plate 32, the latter being secured to the roof deck by securing means 33. Insulation 31 has one edge or face shaped to conform to the outer periphery of well 17 and flange 18, so that the extension 15 is supported in part by the mating of well 17 with the insulation and the mating of flange 18 with the insulation.
  • the roof deck comprises a base member 21 on which is super-imposed a layer of insulation 22; the roof is further built up by subsequent layers 23 of asphalt or bitumen in combination with roofing paper, and, if desired, a layer of gravel 24 may be placed thereupon.
  • a gasket housing 25 Adjacent the well 17, a gasket housing 25 is secured to the roof deck and abuts at one edge the insulation 22.
  • the housing comprises a pair of annular plates 26 and 26a separated by spacers 27 and 27a; plate 26a has a vertical extension 25 which contains the built up section 23 and gravel 24, preventing these materials from eroding into the Well 17 during water flow.
  • Gasket 30 is mated with one of the faces of plate 26, and gasket 29 is mated with the opposing face of plate 2611; the thickness of the flange is such and the thicknesses of the gaskets are such that flange 18 may he slid between the two gaskets without difliculty but always maintaining a proper gasket seal, thereby preventing water from circumventing the flange and entering the insulation 31 or the base member 21.
  • the gaskets 29, 30 are similarly of the asbestos graphite type, which permits such sliding movement between the gaskets while maintaining at all times a proper seal.
  • a spacer 27 may be secured to plate 26 and spacer 27a may be secured to plate 26a so that plate 26 and gasket 30 may be placed first upon the deck and superimposed by flange 18. Gasket 29 is thereafter placed upon the upper section of the flange and plate 21 is secured to the roof deck by securing means 34.
  • extension 15 is resiliently supported by insulation 31, gasket seals 29, 30, and gland seal 10.
  • insulation 31 gasket seals 29, 30, and gland seal 10.
  • flange 18 slides between the two gaskets 29 and 30 and compresses slightly the installation 31; consequently, the entire upper section of the extension 15 may move outwardly due to expansion and this outward movement is absorbed by the insulation 31 and the sandwich type of gasket and flange construction.
  • the deck moves downwardly forcing the extension 15 downwardly further into the fitting 3. If, during the application of such a load, bending also occurs, the flange may slide toward one area of the housing between the gaskets 29, 30, and the well 17 compresses the adjacent area of the insulation 31.
  • the same apparatus compensates for movement or deflections of the roof relative to the piping system.
  • a drain or vent pipe extension comprising a drain pipe, a tubular extension, means coupling the pipe and extension to each other, means in said coupling sealing said extension relative to the pipe and allowing for perpendicular expansion of either the pipe or the extension, a roof deck, a flange on the extension, said flange being spaced.
  • a gasket mated to each face of the flange allowing the flange to move laterally between the gaskets, and means to mount the gaskets and flange to the roof deck.

Description

June 25, 1963 LA VERNE F. TUTTY DRAIN OR VENT PIPE CONSTRUCTION HAVING MEANS TO ALLOW LATERAL AND LONGITUDINAL EXPANSION Filed June 25, 1958 l 9 0gp OOGO I MM
INVENTOR La Verne F Tutty United States Patent poration of New York Filed June 23, 1958, Ser. No. 743,668 1 Claim. ((31. 285-42) This invention relates to drain or vent pipe constructions; more specifically, it relates to vent or drain pipes having means provided therein to compensate for longitudinal and lateral expansion of the piping system r movements of the wall member, through which the pipe protrudes, due to load deflections.
One of the common forms for venting the plumbing system of a building or to provide for drainage of a flat or low pitched roof of the building is the provision of a stack which extends through the roof to the exterior. In this way, the internal pipe system is vented, in the case of a vent pipe, by allowing the gases, vapors, etc., to pass through the vent pipe to the exterior; in the case of a drainage system, the roof is pitched slightly towards the drain pipe and the water is allowed to flow into a well adjacent the pipe and thence into the pipe and the drainage sewers. The defects in these systems are that no provision is made for the continual longitudinal and lateral expansion of the piping system, and no provision is usually made for the deflections of the roof due to a changing load, as, for example, a snow load.
An object of this invention therefore is to provide a novel type of internal roof drain or vent pipe which provides for expansion of the piping system in both a lateral and longitudinal direction.
Another object of this invention is to provide a novel internal roof drain or vent pipe system wherein compensation is provided in the piping system for deflections of the roof due to changing loads on the roof.
Still another object of this invention is the provision of a drain or vent pipe for a plumbing system in a building and with novel means of support for that section of the pipe adjacent the roof.
in brief, the invention comprises an extension on a drain pipe or vent pipe in a building plumbing system whereby the extension is resiliently supported by the roof. Provision is made for longitudinal or vertical expansion of the extension and main pipe and for the lateral expansion of the extension and pipe. The arrangement provided also allows deflections of the roof clue to changing loads to occur without creating stresses in the roof adjacent the connections between the extension and the roof.
These and other objects will be readily apparent from the following more detailed description and the attached drawings wherein:
FIG. 1 is a cross-sectional view of a roof and the upper portion of a drain pipe or a venting system adjacent the roof; and
FIG. 2 is a plan view of the system along section lines 22 of FIG. 1.
Referring to the figures, a drain pipe 1 extends vertically from within the building structure (not shown). For the sake of simplicity pipe 1 will hereinafter be described as a drain pipe; however, it is to be understood that the pipe 1 may be either a drain pipe or a vent pipe as the surrounding constructions for the two are basically the same. In addition, the drain pipe or vent pipe is described as extending through a roof of a building; it is to be understood, however, that the pipe may extend through other wall structures. For example, the drain pipe may be attached to a building structure so that it will drain the floor of such a structure. Consequently,
"ice
although only a roof deck is specifically described and illustrated for the sake of clarity and simplicity, other similar basic structures may be provided with a piping system according to the principles of this invention.
The upper lip of the pipe 1 is externally threaded at 2 and has secured thereto a coupling or fitting 3 which supports, in part, the drain pipe extension 15. Fitting 3 comprises a tubular extension 4 having at its upper portion a flange 5; a second extension 6 extends upwardly from the first extension 4 and flange 5 and is staggered slightly on the flange in order to receive internally the mating section 7 of the fitting. Tubular portion 8 of this latter section 7 is encircled by the tubular extension 6 and has a flange 9 extending transversely from its upper edge; a gasket gland is placed between one of the edges of tubular portion 8 and flange 11 to seal the joint between the mating halves of the fitting. The gland is compressed and the joint between the two portions of the fitting is secured by a plurality of bolts 13 passed through .ports 11, 12 of the flanges 5, 9, which bolts are tightened by nuts 14. During tightening, gland 10 is compressed and extends inwardly thereby sealing the small gap between extension 15 and the fitting. The gland is of the asbestos graphite type so that any expansion in the vertical direction of the drain pipe 1 or the extension 15 allows relative sliding movement in a vertical direction between the extension 15 on the one hand and the fitting 3, including elements 4, 7, and 10, on the other hand, and hence between the extension 15 and the pipe 1, while still maintaining a proper seal between the two.
Extension 15 comprises a main tubular body portion 16 having at its upper end a transverse well 17. The latter, at its upper portion, has a transverse flange 18 extending into the body of the roof. A cap 19 having perforations or ports 20 therein is placed upon the upper internal lip of the tubular body 16 and screens the water flowing from the roof into the well 17 and pipe 1. In the event that pipe 1 is a vent pipe, cap 19 may be omitted if so desired. Extension 15 is supported in part by the tight seal between the fitting 3 and the extension 15 and also by a soft layer of insulation 31 supported from the roof deck by a plate 32, the latter being secured to the roof deck by securing means 33. Insulation 31 has one edge or face shaped to conform to the outer periphery of well 17 and flange 18, so that the extension 15 is supported in part by the mating of well 17 with the insulation and the mating of flange 18 with the insulation.
The roof deck comprises a base member 21 on which is super-imposed a layer of insulation 22; the roof is further built up by subsequent layers 23 of asphalt or bitumen in combination with roofing paper, and, if desired, a layer of gravel 24 may be placed thereupon. Adjacent the well 17, a gasket housing 25 is secured to the roof deck and abuts at one edge the insulation 22. The housing comprises a pair of annular plates 26 and 26a separated by spacers 27 and 27a; plate 26a has a vertical extension 25 which contains the built up section 23 and gravel 24, preventing these materials from eroding into the Well 17 during water flow. Gasket 30 is mated with one of the faces of plate 26, and gasket 29 is mated with the opposing face of plate 2611; the thickness of the flange is such and the thicknesses of the gaskets are such that flange 18 may he slid between the two gaskets without difliculty but always maintaining a proper gasket seal, thereby preventing water from circumventing the flange and entering the insulation 31 or the base member 21. The gaskets 29, 30 are similarly of the asbestos graphite type, which permits such sliding movement between the gaskets while maintaining at all times a proper seal. For installation purposes, a spacer 27 may be secured to plate 26 and spacer 27a may be secured to plate 26a so that plate 26 and gasket 30 may be placed first upon the deck and superimposed by flange 18. Gasket 29 is thereafter placed upon the upper section of the flange and plate 21 is secured to the roof deck by securing means 34.
As described, extension 15 is resiliently supported by insulation 31, gasket seals 29, 30, and gland seal 10. During sideways movement of the extension, a certain aniount of give or compression in the insulation 31 occurs and the flange slides between seals 29 and 30. During lateral expansion of the extension and pipe, flange 18 slides between the two gaskets 29 and 30 and compresses slightly the installation 31; consequently, the entire upper section of the extension 15 may move outwardly due to expansion and this outward movement is absorbed by the insulation 31 and the sandwich type of gasket and flange construction. During movements or deflections of the adjacent areas of the roof deck due to heavy loads, as, for example, a snow load, the deck moves downwardly forcing the extension 15 downwardly further into the fitting 3. If, during the application of such a load, bending also occurs, the flange may slide toward one area of the housing between the gaskets 29, 30, and the well 17 compresses the adjacent area of the insulation 31.
. Thus, it is seen that movement of the extension 15 and the main pipe 1 both in a vertical and in a lateral direction is compensated for preventing the creation of crack forming stresses in the adjacent portions of the roof;
likewise, the same apparatus compensates for movement or deflections of the roof relative to the piping system.
Having thus described my invention in rather full detail it will be understood that the details given are for the purpose of illustration, not restriction, and that variations within the spirit of the invention are intended to be included in the scope of the appended claim.
What I claim is:
A drain or vent pipe extension comprising a drain pipe, a tubular extension, means coupling the pipe and extension to each other, means in said coupling sealing said extension relative to the pipe and allowing for perpendicular expansion of either the pipe or the extension, a roof deck, a flange on the extension, said flange being spaced.
on its outer periphery from adjacent lateral portions of the roof deck, a gasket mated to each face of the flange allowing the flange to move laterally between the gaskets, and means to mount the gaskets and flange to the roof deck.
References Cited in the file of this patent UNITED STATES PATENTS 1,487,161 Holt Mar. 18, 1924 .=1,582,646 Flesch Apr. 27, 1926 1,802,353 Rousek Apr. 28, 1931 2,646,294 Anderson July 21, 1953 2,688,501 MacLeod Sept. 7, 1954 2,828,980 Craig Apr. 1, 1958
US743668A 1958-06-23 1958-06-23 Drain or vent pipe construction having means to allow lateral and longitudinal expansion Expired - Lifetime US3095219A (en)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357678A (en) * 1965-07-26 1967-12-12 American Radiator & Standard Mechanism for mounting a liquid valve
US3884809A (en) * 1973-06-28 1975-05-20 Duane D Logsdon Scupper drain structure
US3954289A (en) * 1974-06-13 1976-05-04 East Houston Air Conditioning, Inc. Plenum starter piece
EP0122800A2 (en) * 1983-04-15 1984-10-24 Malcolm Sydney Uglow Pipe coupling device
EP0350394A1 (en) * 1988-07-06 1990-01-10 Siplast S.A. Rainwater drainage system
US5378356A (en) * 1993-10-01 1995-01-03 Lsp Specialty Products Company Roof drain structure
US20050166315A1 (en) * 2003-12-23 2005-08-04 Zurn Industries, Inc. Floor drain support plate
US20050203468A1 (en) * 2002-01-15 2005-09-15 Zurn Industries, Inc. Drain support plate/under-deck clamp
EP1724410A2 (en) * 2005-05-16 2006-11-22 Per Sommerhein AB An adjustable fixing device for a roof drain
US20070137126A1 (en) * 2005-12-21 2007-06-21 Per Sommerhein Multi-purpose roof outlet
WO2020078868A1 (en) * 2018-10-19 2020-04-23 Iftissen Gerard Drainage device for a construction, in particular a roof of a building or a terrace
WO2020123206A1 (en) * 2018-12-10 2020-06-18 Jmh Innovative Solutions, Llc Sump drain apparatus, system, and method of construction
US11060292B2 (en) 2018-12-10 2021-07-13 Jmh Innovative Solutions, Llc Sump drain apparatus, system, and method of construction
US20210317666A1 (en) * 2020-04-14 2021-10-14 Zurn Industries, Llc Roof drain
WO2021236826A1 (en) * 2020-05-22 2021-11-25 Jmh Innovative Solutions, Llc Sump drain apparatus, system, and method of construction
US20220316215A1 (en) * 2021-04-06 2022-10-06 Rikksen Drainage device equipped with an attachment sleeve for construction, particularly a building roof or a terrace

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1487161A (en) * 1923-03-13 1924-03-18 Holt Roof Connection Company Roof connection
US1582646A (en) * 1926-02-15 1926-04-27 Charles W Flesch Roof connection
US1802353A (en) * 1929-09-19 1931-04-28 John E Rousek Weather shield
US2646294A (en) * 1949-12-27 1953-07-21 North American Aviation Inc Disconnect coupling
US2688501A (en) * 1950-08-21 1954-09-07 Trans Canada Air Lines Exhaust manifold joint
US2828980A (en) * 1954-06-14 1958-04-01 Exxon Research Engineering Co Axial and radial stress relieving conduit coupling

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1487161A (en) * 1923-03-13 1924-03-18 Holt Roof Connection Company Roof connection
US1582646A (en) * 1926-02-15 1926-04-27 Charles W Flesch Roof connection
US1802353A (en) * 1929-09-19 1931-04-28 John E Rousek Weather shield
US2646294A (en) * 1949-12-27 1953-07-21 North American Aviation Inc Disconnect coupling
US2688501A (en) * 1950-08-21 1954-09-07 Trans Canada Air Lines Exhaust manifold joint
US2828980A (en) * 1954-06-14 1958-04-01 Exxon Research Engineering Co Axial and radial stress relieving conduit coupling

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357678A (en) * 1965-07-26 1967-12-12 American Radiator & Standard Mechanism for mounting a liquid valve
US3884809A (en) * 1973-06-28 1975-05-20 Duane D Logsdon Scupper drain structure
US3954289A (en) * 1974-06-13 1976-05-04 East Houston Air Conditioning, Inc. Plenum starter piece
EP0122800A2 (en) * 1983-04-15 1984-10-24 Malcolm Sydney Uglow Pipe coupling device
US4505499A (en) * 1983-04-15 1985-03-19 Uglow Malcolm Sydney Roof drain insert coupling
EP0122800A3 (en) * 1983-04-15 1986-01-08 Malcolm Sydney Uglow Pipe coupling device
WO1990000655A1 (en) * 1988-07-06 1990-01-25 Siplast S.A. Rain water drainage system
FR2633961A1 (en) * 1988-07-06 1990-01-12 Siplast Sa SYSTEM OF EVACUATION OF RAINWATER
EP0350394A1 (en) * 1988-07-06 1990-01-10 Siplast S.A. Rainwater drainage system
US5378356A (en) * 1993-10-01 1995-01-03 Lsp Specialty Products Company Roof drain structure
US20050203468A1 (en) * 2002-01-15 2005-09-15 Zurn Industries, Inc. Drain support plate/under-deck clamp
US7784242B2 (en) * 2002-01-15 2010-08-31 Zurn Industries, Llc Drain support plate/under-deck clamp
US20110023229A1 (en) * 2003-12-23 2011-02-03 Zurn Industries, Llc Floor Drain Support Plate
US20050166315A1 (en) * 2003-12-23 2005-08-04 Zurn Industries, Inc. Floor drain support plate
US8146308B2 (en) 2003-12-23 2012-04-03 Zurn Industries, Llc Floor drain support plate
US7997038B2 (en) * 2003-12-23 2011-08-16 Zurn Industries, Llc Floor drain support plate
EP1724410A3 (en) * 2005-05-16 2008-12-24 Per Sommerhein AB An adjustable fixing device for a roof drain
EP1724410A2 (en) * 2005-05-16 2006-11-22 Per Sommerhein AB An adjustable fixing device for a roof drain
US20070137126A1 (en) * 2005-12-21 2007-06-21 Per Sommerhein Multi-purpose roof outlet
WO2020078868A1 (en) * 2018-10-19 2020-04-23 Iftissen Gerard Drainage device for a construction, in particular a roof of a building or a terrace
FR3087461A1 (en) * 2018-10-19 2020-04-24 Gerard Iftissen DRAINAGE DEVICE FOR A CONSTRUCTION, IN PARTICULAR A ROOF OF A BUILDING OR A TERRACE
US11952780B2 (en) 2018-10-19 2024-04-09 Rikksen Drainage device for a construction, in particular a roof of a building or a terrace
US11060292B2 (en) 2018-12-10 2021-07-13 Jmh Innovative Solutions, Llc Sump drain apparatus, system, and method of construction
US10760275B2 (en) 2018-12-10 2020-09-01 Jmh Innovative Solutions, Llc Sump drain apparatus, system, and method of construction
US11634910B2 (en) 2018-12-10 2023-04-25 Jmh Innovative Solutions, Llc Sump drain apparatus, system, and method of construction
WO2020123206A1 (en) * 2018-12-10 2020-06-18 Jmh Innovative Solutions, Llc Sump drain apparatus, system, and method of construction
US20210317666A1 (en) * 2020-04-14 2021-10-14 Zurn Industries, Llc Roof drain
WO2021236826A1 (en) * 2020-05-22 2021-11-25 Jmh Innovative Solutions, Llc Sump drain apparatus, system, and method of construction
US20220316215A1 (en) * 2021-04-06 2022-10-06 Rikksen Drainage device equipped with an attachment sleeve for construction, particularly a building roof or a terrace
US11920350B2 (en) * 2021-04-06 2024-03-05 Rikksen Drainage device equipped with an attachment sleeve for construction, particularly a building roof or a terrace

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