Very large openings, special O-rings , Sturdy and rugged design are some of the many features incorporated in the Flush Valve. Ravands Flush valve is easy and quick to install allowing the user to completely remove entrapped dirt in the line. It’s a Flush valve that meets harsh and unpredictable field requirements. unique seal design for leak proof joint for low tightening torque.Threaded facility to open/ close the cap with grippers.