Neptune Innovations LLCintroduces the Pump ‘N’ Plug to stop dripping water so plumbers can solder. No more waiting for dripping water, this flexible plumber tool goes through elbows and T’s. Pump ‘N’ Plug is designed to plug and stop dripping water from pipes in diameters ranging from 1/2 inch to 2 inches of copper or P.V.C. It’s made of a strong and durable rubber, which can withstand temperatures up to 400 degrees F.