Three 38 mm rubber winterizing plugs designed to seal pool and pipe openings during cold weather. This set helps protect pool plumbing from freeze damage by creating a tight, expandable seal in standard 38 mm openings. The flexible rubber construction resists cracking in low temperatures and remains durable over multiple seasons. Key benefits Prevent freeze damage: seals drains, pipes, and fittings to reduce the risk of water remaining in lines and expanding when frozen. Easy to install: simple insertion creates a secure seal without special tools. Flexible, durable material: rubber tolerates cold temperatures and remains pliable for reliable sealing. Costeffective, multiuse set: includes three plugs for addressing multiple lines or areas at once. What you get and key attributes Functionality: winterizing plug for swimming pool plumbing and pipe openings. Compatibility: designed for 38 mm diameter openings; suitable for pool drains, lines, and related fittings with 38 mm size. Size: 38 mm diameter plug. Material: rubber, offering flexibility and a tight seal. Performance: expansionstyle seal provides reliable compatibility with 38 mm fittings and resists cracking in winter conditions. Quantity: 3 pieces per set. Ideal use cases Pool winterization: seal pool drain lines and lines to prevent water from remaining in pipes during offseason. Equipment protection: plug plumbing connections to safeguard pool equipment (pump, filter) from freezing. Pond or irrigation lines: substitute or temporary plugs for 38 mm diameter openings in garden pools, ponds, or irrigation systems during cold weather. Notes Inspect openings for clean, dry surfaces before insertion to maximize seal effectiveness. Check local weather conditions and follow pool maintenance guidelines when winterizing.