Premium Material: These pool hose adapters are made of high-quality, wear-resistant, and durable plastic. They do not easily deform or break, do not rust, and are built to last, making them the perfect partner for your pool. Pool Adapter A: If you only have a 1.25 \" hose adapter for your pump but want to install a 1.5 \" plunger valve or upgrade to a more powerful filter pump, this pool adapter is the perfect solution. Applicable Diameter: These pool hose adapters can be used as an alternative to spiral hoses and are suitable for connecting pool hoses, including 38 mm and 32 mm pool hoses with a 2 \" external thread, such as those found in standard filtration systems. Specifications: These pool hose adapters are suitable for all 4000, 2500, 2000, and 1500 gallon/hour filtration pumps with threaded hose connections. Please check the specifications before purchasing. Wide Range of Applications: These pool adapters are suitable for filtration system hoses, submersible pumps, pool pumps, filter pumps, sand filters, or shut-off valves. We recommend using hose clamps where the water line connects to the fitting.