Winterizing plugs are used to seal pool plumbing lines during seasonal shutdown, helping protect pipes and fittings from freeze-related damage. These plugs are installed in returns, skimmers, and other openings to prevent water from entering areas that could crack under pressure. Plug selection is typically based on pipe size and pool configuration. Winterizing plugs are commonly used alongside pool blowers to clear lines before sealing. Many pool owners also rely on closing kits to ensure all steps are completed properly. For surface protection, plugs are often paired with safety covers.
