Replacement pool filter pump plunger on/off valve for use with Intex above ground pools using 1-1/2" diameter hoses and 2-5/8" outside diameter x 2-3/8" inside diameter threaded pool connection fittings (Threaded collar that attaches to pool strainer assembly at pool wall)If your pool has larger thread connections, 2-7/8" outside diameter x 2-1/2" inside diameter threaded collar, you will need to purchase our complete strainer and valve assembly and replace valve and strainer assembly.