Test closure plug for the trap bushing of a conventional T-fitti

Details Test closure plug for the trap bushing of a conventional T-fitti Test closure plug for the trap bushing of a conventional T-fitti

1997-03-13

1999-05-04

Ferensic, Denise L.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

138 92, 138967, F16L 5510

Patent

active

058992340

ABSTRACT:
A plumbing fitting comprising a test closure plug for the free end of a trap bushing mounted in the center port of a T-fitting constituting a part of a soil pipe and vent pipe assembly of a plumbing system the free end of the trap bushing is provided with an adapter having an adapter nut and washer. The washer is removed and the plug is inserted in the adapter opening. The plug is configured to close the adapter opening and make a seal therewith when held in place by the adapter nut. The plug enables pressure testing of the plumbing system or the maintenance of a head of water therein. Upon installation of a fixture with a trap, the nut is removed, the plug is removed, the adapter nut and washer are then used in common trade fashion to connect the trap to the trap bushing in fluid-tight fashion by way of a slip joint. The plug can be reused. A second embodiment of the plug can be used for the same purpose when the nut of the adapter is of the type wherein the adapter washer forms an integral one-piece part of the nut. The second embodiment of the plug can also be used with an adapter having a nut and a separate washer by mounting the washer on the plug, thereby rendering the second plug embodiment similar to the first plug embodiment.

REFERENCES:
patent: 0784931 (1905-03-01), Duncan
patent: 1569875 (1926-01-01), Nixon
patent: 1692710 (1928-11-01), Spahn
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patent: 3036601 (1962-05-01), Fabian, Jr. et al.
patent: 4139005 (1979-02-01), Dickey
patent: 4673393 (1987-06-01), Suzuki et al.
patent: 4883085 (1989-11-01), Weller et al.
patent: 5104150 (1992-04-01), Bard et al.
patent: 5388288 (1995-02-01), Fell, Sr.

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