This four piece winterizing plug set is designed for above ground swimming pools, providing durable, reliable seals to protect fittings and equipment during and after the winter season. It offers multiple plug options and sizes to fit a range of pool configurations with a focus on simple, secure use. Components The plug: durable material built for long lasting winterizing use. Swimming pool line plug: strong and durable, designed to seal the pool line during winter to protect filters and equipment. Expansion freeze plug: expansion type plug for above ground pools to properly winterize and seal fittings during winter. Rubber winter plug: rubber plug that expands to seal and prevent water from leaking out and damaging pool fittings and nozzle; available in 9 sizes. Key benefits Effective winter protection: seals lines and fittings to prevent water ingress, freezing damage, and leaks. Durable construction: designed for repeated seasonal use with reliable performance in cold conditions. Flexible sizing: 9 size options to fit a wide range of aboveground pool fittings and connections. Easy to install and remove: simple plugandseal operation suitable for routine seasonal maintenance. Keeps equipment safe: reduces risk of damage to pumps, filters, and nozzles during the offseason. Specifications and compatibility Intended for aboveground pool applications and standard line fittings. Available in 9 sizes to accommodate different connection diameters and configurations. Includes four plug types to support comprehensive winterizing of lines and associated fittings. Use scenarios Scenario 1: Winterizing an aboveground pool before freezing temperatures. Install the line plug and expansion freeze plug to seal off the lines and protect the pump and filter from ice damage. Scenario 2: Offseason storage or prolonged shutdown. Use the rubber winter plug to block water flow and prevent leakage that could damage fittings or nozzles. Scenario 3: Spring startup preparation. worn or aged plugs with these replacements to ensure secure seals when reopening the pool for use.