Hayward 1-1/2-Inch MIP Concrete Pool Drain Plug with O-Ring, Pack of 250

Hayward all purpose drain plug comes with O-ring. Designed to use for concrete pools. Simply screw threaded plugs into all return and drain inlets after blowing out lines. Helps prevent damage to plumbing lines due to the expansion of freezing water. Measures 1-1/2-inch MIP thread size. Includes 250 plugs in bulk pack.