Sioux Chief 821-TP Double Duty 2 inch Scew In Test Plug

During installations of 821 Series shower drains, Sioux Chief recommends performing two tests to reduce the occurrence of leaks: a test of the drain-to-pipe connection and a "flood test" of the waterproof membrane - The unique DoubleDuty plug seals the drain above the pipe and below the clamping collar, allowing both tests to be performed properly - Easy to install and remove - Eliminates inflatable test balls and other glue-in or mechanical plugs