National Diversified Sales 41P8 4" White MPT PVC S&D Cleanout Plug enables access to sewer and drain (S&D) pipe systems to feed a plumbing snake into a clogged drain pipe. Attaches to, and removes easily from drainage fittings with threaded connections. The 4 in. Male Pipe Thread (MPT) connection on the plug fits 4 in. Female Pipe Thread (FPT) connections of other drainage fittings, sold separately. The drain fitting is made of polyvinyl chloride (PVC). Meets applicable ASTM standards. For use in non-pressurized underground sewer and drainage applications; maximum working pressure of 5 psi. Hassle-free limited lifetime warranty guarantees the NDS product is free from defects—or we’ll replace it.