NDS 1001-05 200 PSI White PVC EPDM Rubber Check Valve 4-1/8 L x 1/2 FPT in.
Spring gives positive seal with no back pressure. Reinforced Poppet. Designed for any system where back flow is not desired. Spas, swimming pools, industrial and irrigation. Complies with all applicable ASTM and ANSI standards.