Sioux Chief 3-1/2" Female Clean Test Plug. It is a 100% corrosion-proof plug that seals 3.5" female clean test plugs. It can be put in threads or inside 4" pipe. For use in both pipe end and cleanout threads. Polypro wingnut, nylon top plate, soft PVC (polyvinyl chloride) gasket, and nylon base/stem for simplicity and strength. Provides a leak-free seal at over 8 times the P.S.I. of other mechanical test plugs. Back-to-front wedge design prevents blowouts at high and low temperatures. Nonslip shoulder for fast, easy installation.

• 3-1/2 in.
• 100% corrosion proof
• Seals 3.5 in. female clean test plugs
• Can be put in threads or inside 4 in. pipe