| 摘要 |
A plumbing line test plug includes a plug body adapted to plug an interior diameter of a plumbing line. The body has a wet face, which is exposed to liquid when in use, and a dry face, which is opposed to the wet face. A flexible pressure responsive annular membrane extends outwardly and rearwardly from the wet face. Hydraulic pressure of liquid in the plumbing line, forces the flexible pressure responsive annular membrane into sealing engagement with interior walls of the plumbing line.
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