General description Protect your swimming pool's plumbing with the CSPARKV 5pcs Winter Plug set. Designed to winterize water return pipes, these plugs prevent rainwater from entering and freezing, which can cause pipes to rupture. Ideal for family garden swimming pools and other aquatic facilities, these winter plugs ensure a pleasant swimming experience while safeguarding your pool from damage. Technical specifications Material: Plastic Thread size: 1.5 inches Quantity: 5 pieces Installation Simply twist the plugs into the designated openings of the return ports. No additional fasteners are required. Check the seal after installation for optimal protection. Usage Can be used to seal skimmers, return lines, and detergent lines. Suitable for various applications including massage bathtubs and SPA accessories. Other information The plugs are designed to withstand extremely cold temperatures without slipping or shrinking. Complies with standard specifications for sealing performance and