Premium Material: Swimming pool A adapters are made of premium plastic, they are very strong, waterproof, wearable, corrosion resistant and not easily deformed or broken. The rubber ring is firmly connected to the hose to form a sealed space to prevent water leakage. Easy to install swimming pool hose adapter: the small end is connected to the 1.25 hose ". The threaded end is connected to a 1.5" piston valve or filter pump. Just screw it on. You don't need to buy extra hoses and avoid extra costs. Swimming pool hose adapter size: hose adapter for pumps for all 4000, 2500 filtration pumps , 2000 and 1500 gallons/hour with threaded hose connections. Note: Please confirm the specifications before purchasing, please check the picture carefully for the specific size! . Wide range of applications: adapters swimming pool A are suitable for pipes of filter systems, submersible pumps, swimming pool pumps, filter pumps, sand filter systems or shut-off valves. We recommend using hose clamps in the area where the water pipe meets the socket. Any questions before purchasing or during use, welcome contact us, we will answer you first time, thank you! Our service: We are committed to providing you with satisfactory service. If you have any questions, you can contact us at any time. We will reply to you within 24 hours and try our best to resolve the problem for you.