Winter pool plug set designed to protect pool plumbing and pump hoses from freeze damage. Durable construction and easy installation make it a practical addition to pool winterizing supplies. Key benefits Prevents water from entering covered pipes and pump hoses, helping reduce the risk of freezerelated cracking and damage. Durable materials for long service life: molded rubber sealing surface with polypropylene body for rigidity and wear resistance. Simple, tool installation: screw the plug onto the threads of the pump hose to create a secure seal. Product details Material: rubber and polypropylene. Size: diameter approximately 9 cm or 3.54 inch. Function: blocks water from migrating into covered pipes and threaded hose connections during cold weather. Compatibility and use Intended for use on pump hoses and threaded pipe connections where the plug fits the hose thread. Check that the plug thread matches the hose or fitting before installation. Practical applications Winterizing backyard pools: install on pump hoses and covered inlets when closing the pool for the season. Offseason equipment storage: cap pump hose threads before removing or storing pumps to keep water out of lines. Shortterm protection during cold snaps: quickly cap exposed threaded fittings on pool equipment while maintenance is performed. Notes on performance The rubber sealing surface conforms to threads to help create a tight closure, while the polypropylene body provides stability and resistance to cracking. Regular inspection before and after winter storage is recommended to confirm a secure fit and intact seal.