Quick Installation: Simply connect the small end of the adapter to a 1.25-inch hose. Attach the threaded end to a 1.5-inch plunger valve or filter pump, and tighten.High-Quality Pool Hose Adapter: The Type A pool adapter is made of corrosion-resistant plastic for durability. The rubber ring fits snugly with the 1.25-inch hose, creating a leak-proof seal, making it an ideal addition to your pool connection kit. 3. Easy-to-Install Hose Adapter: The Type A pool adapter is designed to connect a 1.25-inch hose to a plunger valve or filter pump. The small end connects to a 1.25-inch hose. The threaded end connects to a 1.5-inch plunger valve or filter pump. Simply tighten. No need to purchase additional hoses, eliminating the extra cost. 4. Pool Adapter Size A: The Pool Adapter A is compatible with all filter pumps with flow rates of 4000, 2500, 2000, and 1500 gph and a threaded hose connection. (Note: Please refer to the image carefully for exact dimensions!) 5. Pool Adapter with Wide Applications: The pump hose adapter is suitable for hoses from filtration systems, submersible pumps, pool pumps, filter pumps, sand filter systems, or shut-off valves. We recommend using a hose clamp at the connection between the hose and the nozzle.Note: Light reflections and different monitors may cause the color of the item in the image to vary slightly from the actual item. Measurements may vary by +/- 1-3 cm.