Threaded Rubber Plug for Inground & Aboveground Pools

This handy winterizing plug is used as a final step in winterizing your inground or aboveground pool's skimmer and plumbing lines, and can prevent costly damage from ice expansion during the winter months. Simply screw a threaded Plug into each return line and drain inlet fitting after blowing out the lines, to prevent damage from freezing water during the winter months.