Pool Winterizing Expansion Plug for Drain, Skimmer, and Plumbing Clear, reliable solution for blocking pool drains and skimmers during winterizing, maintenance, or repairs. This expansionstyle plug seals plumbing openings to limit water flow into lines and simplify winter preparation and service tasks. Key benefits Multiuse function: works as a drain plug, skimmer plug, plumbing plug, water drainage plug, and winterizing plug. Simple sealing action: expansion design forms a snug fit inside a pipe or skimmer throat to reduce flow and hold back water during service. Easy to install and remove: expand or seat the plug with straightforward hand operation for fast setup and seasonal removal. Reusable and low maintenance: designed for repeated use through multiple winter cycles and maintenance jobs. Space and time saver: eliminates the need for complicated fittings or temporary plumbing while performing repairs or winterizing. Important attributes Function: expansionstyle plug for blocking water flow in pool drains, skimmers, and plumbing lines. Compatibility: intended for common pool plumbing and skimmer openings; suitable for use where an internal expanding seal is required. Confirm fit with existing skimmer or drain dimensions before use. Size and fit: expansion mechanism accommodates a range of internal diameters; verify compatibility for your specific application. Construction and performance: built to perform the sealing function required for winterizing and maintenance tasks and to withstand pool environment use. Practical applications Winterizing an inground pool: seat the plug in skimmer throats and main drains to limit water in lines before adding antifreeze or closing. Pool repairs and maintenance: isolate sections of plumbing while replacing liners, servicing pumps, or repairing valves. Seasonal pool draining and storage: temporarily block drainage points when lowering water level for major maintenance. Usage tips Check fit before installation and handexpand until a snug seal is achieved. Store dry when not in use to extend service life. Confirm plug size versus skimmer or drain opening prior to to ensure correct fit. This expansion plug provides a practical, reusable way to control water in pool plumbing during winterizing and maintenance operations.