Fits Intex 4000, 2500, 2000 and 1500 gallon per hour filter pumps that use threaded hose connections. Fits A series adaptor for 25007. Converts threaded hoses to clamp style hoses and 1.5 and 1.25-inch hoses for Intex pool sets. Adapter A will work closely with other pool fittings to keep your pool running safely and efficiently. This pool hose adapter is used for saltwater system of above ground swimming pool. If you only have 1.25" hose, but you want to install a 1.5" plunger valve or upgrade to a stronger filter pump, the adapter A will be good the solution. Converts 1.5 and 1.25 hoses for Intex pool sets.Converts threaded hoses to clamp style hoses. Fits Intex 4000, 2500, 2000 and 1500 gallon per hour filter pumps that use threaded hose connections. Fits Intex chlorine generators and salt systems that use threaded hose connections. The rubber ring is tightly fitted with the 1.25" hose to form a sealed space to prevent water leak. The swimming pool parts are made of high quality plastic materials, which is sturdy and durable. Adapter A will work closely with other pool fittings to keep your pool running safely and efficiently. Welcome to order our products, I wish you a happy life!