Conversion AdapterThe pool hose adapter is for above ground swimming pool salt water system. Adapter A is the perfect solution if you only have 1.25" hose but want to install a 1.5" piston valve or upgrade to a more powerful filter pump. CompatibleOne pair of adapter series A, 25007. Fits all 4000, 2500, 2000 and 1500 gph filter pumps using Intex threaded hose fittings. High Quality MaterialThe pool parts are made of high quality plastic, which is strong and durable. The rubber ring is tightly connected with the 1.25 inch hose to form a sealed gap to prevent water leakage. Easy to InstallHose Adapter A is designed to connect 1.25 inch hose with piston valve or filter pump. The small end connects to a 1.25" hose. The threaded end connects to a 1.5" plunger valve or strainer pump, just screw on. No need to buy another size hose and avoid extra costs. Connect HoseConvert threaded hose to clamp hose and 1.5" and 1.25" hose for Intex swimming pool set. Compatible with Intex chlorine generators and salt systems connected using threaded hose. These Type A adapters work snugly with other pool accessories to keep your pool running safely and efficiently.