General description Protect your swimming pool's plumbing with the CSPARKV Winter Plug set. Designed to winterize water return pipes, these plugs prevent rainwater from entering and freezing, which can cause pipeline ruptures. Ideal for family garden swimming pools and other swimming pool applications, these rubber winter plugs ensure a pleasant swimming experience by safeguarding your pool from potential damage. Technical specifications Quantity: 5 pieces Thread size: 1 1/2 inches Material: Plastic with rubber O-ring Temperature resistance: Can withstand extremely cold temperatures Installation Simply twist the plugs into the designated openings. No additional fasteners are required. Check the seal for optimal protection. Usage Can be used to seal skimmers, return lines, and detergent lines. Suitable for use in massage bathtubs, swimming pools, and spas.