Safe-t-seal, professional drain line test plug, features safety valve, waffle pattern exterior, inflates using water or air, best inflation pressure is 50 psi maximum back pressure of water is 30', if water is used, unit will both test and fill drain simultaneously, fits drains 3 inch to 4 inch diameter. The product is manufactured in china. Easy installation and easy handling.
This safe-t-seal test plug fits 3-Inch to 4-Inch pipes. Its non-slip rubber with waffle body is used to test water lines in new construction and renovation projects. It has a patented pressure release safety valve to help prevent over inflation or blow-out.