Various Connection MethodsOur pool hose adapters can be applied to a variety of different connection methods. Because each user's pool equipment and hose size are different, the actual connection method is different. Also, A-type and B-type adapters can be used together or separately. You can choose the installation method according to your own hose.Applicable SizeOur A-type hose adapter can connect male threads with an outside diameter of approximately 2 3/8 inches, and be wrapped with 1 1/4 or 1 1/2 inch hose. B-type hose adapter can connect female threads with an inside diameter of approximately 2 3/8 inches, or wrap a 1 1/4 inch hose. Compatible with Intex 4000, 2500, 2000, and 1500 GPH filter pumps. Also compatible with above-ground pool saltwater generators and saltwater systems.Economically EfficientMany homes' above-ground pool inlets/outlets fit about 1 1/4" hose, while purchased filter pump inlets/outlets fit about 1 1/2 or 2" hose. This product can be connected to different caliber hoses or other connections to solve the problem of incompatibility between above-ground pools and filtration pumps and enhance the compatibility of the two types of equipment. Helps you to connect existing hoses instead of buying a new larger hose.Durable & SealingOur pool hose connector set is made of high-quality material, which can withstand all kinds of bad weather and is so strong that you don't need to worry about leakage. Our products also include 2pcs rubber gaskets and 2pcs stainless steel clamps to increase the connection seal. Our pool vacuum hose adapter kits will save you time shopping and meet all your needs at once.Filter Pump Hose Adapter SetYou will receive 2 pcs A-type of hose adapters, 2 pcs B-type hose adapters, 2 pcs 27-51mm stainless steel clamps, and 2 pcs 40mm inside diameter rubber washers. This kit is perfect for systems that need to upgrade from a 530 GPH or 1000 GPH filter pump to a 1500 GPH or larger and can solve the problem of the hose not fitting with the filter pump.