Premium Material: These pool hose adapters are made of high-quality plastic, which is durable and solid, not easily deformed and broken, rust-proof, and can last for a long time, making it the best partner for swimming pools. Pool Adapter A: If you only have a 1.25 \" hose adapter for pumps, but want to install a 1.5 \" plunger valve or upgrade a more powerful filter pump, this pool adapter is the perfect solution. Applicable Diameter: Pool hose adapters can be used alternatively to spiral hoses, suitable for connecting pool hoses, for 38 mm pool hoses and 32 mm pool hoses with 2 \" external thread, such as standard filter systems. Specifications: Pool hose adapters suitable for all filter pumps of 4000, 2500, 2000 and 1500 gallons/hour with threaded hose connections, please check the specifications before purchase. Wide Range of Applications: Pool A adapters are suitable for system hose filters, submersible pumps, pool pumps, filtration pumps, sand filters or shut-off valves. We recommend using hose clamps in the area where the water pipe touches the outlet.