This 1 inch female check valve is a spring-loaded non-return valve which can be installed inline or at any angle. This check valve allows the fluid to flow in one direction only and is ideal for pumping, marine, irrigation, domestic, agricultural, and industrial applications. This valve consists of a fiberglass reinforced nylon body, female NPT threads, 316 stainless steel spring, acetyl plunger, and nitrile rubber seal and O-ring. This strong, lightweight valve can also be taken apart for servicing.