Pool filter and gel plug, suitable for most Hayward Pentair pool filters (2-pack)

Powerful: Protects against damage caused by freezing water. High-quality material: The socket is made of high-quality, corrosion-resistant material, offering good durability and stability. Easy to install: The threaded connectors are easy to install and use, and can directly replace old or faulty connectors. Strong seal: This test plug with a rubber ring is watertight and will not damage the return hose due to leaks. Applicable: This winter plug is suitable for hot tub accessories, pool accessories, and spa accessories.