Patent ID: 7472912

Claim:
A coupling used during testing of a water line including an upstream pipe with a wye or tee therein and a downstream pipe, said coupling comprising a cylindrical wall member, and a planar disc disposed within the wall member substantially at a right angle to the cylindrical wall member, said cylindrical wall member and planar disc being a single piece body molded from a resilient material as a unitary structure, said planar disc forming within the wall member on one side of the planar disc an upstream wall section sized to frictionally receive the upstream pipe and on the other side of the planar disc a downstream wall section sized to frictionally receive the downstream pipe, said planar disc acting as barrier that prevents water from flowing from the upstream pipe into downstream pipe and being removable, with at least one score line therein enabling the disc to be detached from the cylindrical wall when only a pulling force is applied thereto so the disc is removed from the water line to enable water to flow through said water line, and a pulling device attached to the planar disc, said pulling device having a cord including a portion adapted to extend through the wye or tee in the upstream pipe that enables the planar disc to be detached from the cylindrical wall member while the coupling is connected to the upstream and downstream pipes by applying only said pulling force using said cord.