Technical Products Tool Winter Plug

This number 15 pool plug creates a tight seal for a 4 inch PVC pipe. Rubber winterizing pool plugs are vital to closing your pool. Safely seal off inground 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 non-corrosive construction made of heavy-duty nylon, stainless steel, and high quality rubber. The wing nut turns easier and provides 50% greater tightness than conventional plugs.