Edson's Foot Valve w/ bronze strainer and Nitrile check valve keeps debris and stones out of your pump while maintaining a prime in the suction line. It come equipped with mounting studs on the strainer so it can be fixed for permanent installations. Ideal for boat bilge and sump application. This Edson Foot Valve has 1.5" FNPT (Female National Pipe Threads) for easy attachment to hose or pipe fittings ending with 1.5" MNPT (Male National Pipe Threads).