Plumbing test and trap fitting

DETAILED DESCRIPTION OF THE INVENTION Reference is first made to FIGS.
1 and 2, wherein the test and trap fitting of the present invention is generally indicated at 1.
The fitting 1 has a tubular body 2 with an open end 3 and a closed end 4 comprising an integral, one-piece part of the fitting 1.
As is best shown in FIG.
2, the fitting 1 is circular in cross section.
The fitting 1 is intended for use with conventional plastic plumbing piping and fittings, and lends itself well to being moulded of ABS or PVC plastic material.
Reference is now made to FIG.
3 wherein an exemplary installation of the fitting 1 is illustrated.
A conventional soil pipe and vent pipe assembly is shown, generally indicated at 5.
The assembly 5 comprises a soil pipe 6 and a vent pipe 7 connected to the aligned ports 8 and 9, respectively, of a T-fitting 10.
The soil pipe and vent pipe assembly 5 is shown mounted within a partition wall generally indicated at 11.
The partition wall 11 comprises a plurality of vertical joists, one of which is shown at 12, supporting drywall panels 13 and 14.
The T-fitting 10 has a center branch 15 providing a center port 16.
The T-fitting center port 16 is accessible through a hole 17 cut in the wall panel 13.
For purposes of this exemplary showing, let it be assumed that the soil pipe 6 and the vent pipe 7 are well known and readily available 1.
5 inch (nominal internal diameter) schedule 40 plastic pipes, and that the T-fitting 10 is a schedule 40 T-fitting therefor.
As a consequence, all three T-fitting ports 8, 9 and 16 have an internal diameter to just nicely receive the outside diameter of the 1.
5 inch schedule 40 pipe with close tolerance, enabling fluid-tight connections between soil pipe 6, vent pipe 7 and T-fitting 10 by solvent welding or the like.
The test and trap fitting 1 of the present invention has an outside diameter equivalent to the outside diameters of pipes 6 and 7 (i.
e.
about 1.
900 inches).
As a result, its open end 3 is receivable within the center port 16 of T-fitting 10 with a close tolerance enabling a fluid-tight connection, again by solvent welding or the like