Description Versatile ApplicationDesigned as a pipe plug for winter pool maintenance, preventing pipe entry and protecting against freezing. Also useful for pressure testing and backflow prevention during equipment maintenance. Durable ConstructionMade from high-quality rubber and stainless steel, ensuring stability and longevity. Cold-resistant design prevents slipping or shrinking, allowing for long-term use. Easy InstallationSimply screw the plug into the return water inlet to effectively protect your pool pipes from damage and potential freezing. Multipurpose UseSuitable for above-ground and in-ground swimming pools, outdoor pools, kitchen and bathroom sinks, and small indoor pools. Can also be used as a pipe plug for connecting storage devices. Prevent Pipe BurstsThese threaded plugs for pool return pipes help prevent pipe bursts during harsh winter conditions, ensuring your pool system remains intact. Specifications: Material: rubber + stainless steel Size: large head diameter: 32mm, small head diameter: 27mm, applicable diameter: 32mm hole Package included: 1 x Pool Winterizing Plug