Threaded Pool Return Line Plug - IG Pools
SAFELY SEAL OFF IN-GROUND POOL PLUMBING LINES DURING FREEZING CONDITIONS!By simply screwing threaded plugs into all return and drain inlets after blowing out lines, you can prevent damage to plumbing lines due to the expansion of freezing water. The In-Ground threaded plug is the perfect winterizing solution for keeping your pool pipes damage-free during the winter.