1. This pool hose adapter is suitable for above ground swimming pools. perfect for fitting a 1.25inch hose to a 1.5inch plunger valve or upgrading to a stronger filter pump. 2. High compatibility. Specifically designed for threaded connection pumps. Compatible with all 4000, 2500, 2000 and 1500 gallon/hour filter pumps with threaded hose connections. 3. The pool drain adapter makes the connection tighter, which helps to improve filtration, improve water quality, and make the water flowing into the pool clearer. 4. These pool drain adapters are made of reliable and harmless materials, which are durable and safe to use. It has a long service life and is the perfect replacement. Replacement Hose Adapter Kits with Collar for 4000 2500 2000 1500 Threaded Connection Pumps Swimming Pool Parts Colour:As Shown Material:plastic Package Contents: 4 * adapters 4 * rubber pads 4 * Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.