Pool Winterizing Plug-Premium 0.85" to 1" Swimming Pool Winter Expansion Plugs for Swimming Pools and Spas

Rubber Winterizing Expansion Plug 0.85 in to 1in Safely seal off in-ground plumbing lines during freezing conditions! Winter freeze plugs are used to plug your swimming pool pipes after they have been drained to prevent water from entering the pipes and causing freeze damage. The rubber expansion plugs are construction made of heavy-duty nylon, stainless steel, and high quality rubber. Simply screw plugs into all return and drain inlets after blowing out lines. Features stainless steel bolts and washers and large metal wing-nuts.