Pipe joints or couplings – Roof or floor drain flashing type
Patent
1991-11-14
1994-04-05
Safavi, Michael
Pipe joints or couplings
Roof or floor drain flashing type
52232, 210165, 404 2, E03C 112, F16L 502
Patent
active
052998363
DESCRIPTION:
BRIEF SUMMARY
This invention relates to the drainage of waste water from the floor of a wet area, such as a shower recesses, and provides an improved support for the floor waste fitting.
Current building practice in the construction of bathroom and shower floors is to provide a flat wood, concrete, compressed asbestos sheet or fiber board floor and cover this flooring with ceramic tiles. Drainage of water from the surface is provided by having a floor waste fitting in the floor and angling the upper surface of the ceramic tiles towards the waste fitting such that surface water flows to the waste fitting.
Ceramic tiles are laid on a relatively dry morter mix which is inherently porous. This feature when associated with unavoidable cracking due to shrinkage when the mortar dries, means that the tiles and mortar do not present an impervious surface to any water which spills on the floor.
If water falling on the tiled surface passes through the mortar and is trapped between the tiles and the underlying floor it cannot pass into the waste fitting, which has its entry point on the tile upper surface. In such cases the water will leach alkalis from the mortar to form a concentrated alkali solution which will attack the flooring underneath the tile mortar. Even if a water-resistant fiber board is used, laid on wood rafters, any water which leaks around the floor waste fitting hole in the fiber board will bypass the fiber board and attack the underlying rafters, causing wet-rot. In the case of concrete floors, corrosion of the reinforcement is likely to occur.
Accordingly, it is a main aim of the invention to provide an arrangement in which water trapped between the tiles and the underlying structure can be directed to the drain associated with the floor waste fitting thereby substantially eliminating the incidence of water induced structural damage.
Broadly, the invention can be said to comprise a floor waste fitting support comprising a body, a passageway though the body from an inlet end to a discharge end of the body, said passageway including a first part adjacent said inlet body end which is larger in cross-section than the external dimension of a body part of a floor waste fitting to be supported, positioning means within said passageway to be engaged by the body part of a floor waste fitting thereby to position said floor waste fitting within said floor waste fitting support, water bypass means within said passageway to bypass said positioning means and place said first passageway part in permanent commuication with said passageway downstream from said positioning means, said body is adapted internally and/or externally at its discharge end for connection to a drain pipe.
Presently preferred embodiments of the invention will now be described with reference to the accompanying drawings in which:
FIG. 1 shows an axial cross-section of a first embodiment of the invention,
FIG. 2 shows an axial cross-section of a second embodiment of the invention,
FIG. 3 shows an axial cross-section of a fall and cap member for use with the invention,
FIG. 4 shows an axial cross-section of an installation of the first embodiment of the invention with a fall and cap member,
FIG. 5 shows an axial cross-section of an installation of the second embodiment of the invention with a fall and cap member,
FIG. 6 shows an axial cross-section of the installation of FIG. 4 for a 50 mm drain pipe and modified to provide a fire rated collar as would be used in high rise buildings,
FIG. 7 shows a view similar to FIG. 6 but using a support of FIG. 2 and coupled to an 80 mm drain pipe, and,
FIG. 8 shows the arrangement of FIG. 6 after the installation of a floor waste fitting in the support and the effect after tiling up to the top of the floor waste fitting.
Referring to FIG. 1 there is shown a floor waste fitting support according to a first embodiment of the invention. The support has a body 1 which is circular in cross-section but can be of other shapes. The body has an inlet end 2 and there is an outwardly directed continuous flange 3 around that end. I
REFERENCES:
patent: 1786558 (1930-12-01), Boosey
patent: 1828601 (1931-10-01), Frye
patent: 1941537 (1934-01-01), Boosey
patent: 1982348 (1934-11-01), Luff
patent: 2091927 (1937-08-01), Hirshstein
patent: 2490075 (1949-12-01), Matheis
patent: 2672205 (1954-03-01), McDonald
patent: 4730854 (1988-03-01), Cuschera
Safavi Michael
Schindler Edwin D.
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