1.5" to 1.25" Replacement Threaded Pool Hose Connector Fits all Intex 1500,2000,2500 and 4000 gallon per hour filter pumps that use threaded hose connections. 25007, Adapter A for Intex Chlorine Generator and Salt Systems with Threaded Hose Connections Hose Adapter A w/ Collar Fits Intex Pool Sets With 1.25 And 1.5-Inch Hoses The Most Common Use For These Adapters Is To Connect Intex Male Threaded Connectors To Clamp-Style Hoses. Above Ground Pool Hose Adapters Are Made Of High Quality Plastic Material With O-Rings For A More Watertight Connection, Allowing Your Pump To Operate At Peak Efficiency. Pool Hose Adapter A with Collar Easy to install: used to connect threaded hoses to inflatable swimming pools, with threaded ends connected to a 1.5 "plunger valve or filter pump, just screw them on. 1.5" to 1.25" Replacement Threaded Pool Hose Connector Pool Hose Adapter A w/Collar for Threaded Connection Pumps and Salt Systems Color: gray Adaptability: Suitable for all 4000, 2500, 2000, and 1500 gallon per hour threaded hose connections of filtration pumps.Easy to install: used to connect threaded hoses to inflatable swimming pools, with threaded ends connected to a 1.5 "plunger valve or filter pump, just screw them on.Applicable to: Suitable for chlorine generators and salt systems connected using threaded hoses. If you only have a 1.25 inch hose, but you want to install a 1.5 inch plunger valve or upgrade to a stronger filtration pump, adapter A will be a good solution.