The Bendix 7/8"-14 Inlet Port 250 ± 10 psi ST-4 Safety Valve is designed to provide pressure relief in a system when the pressure exceeds a predetermined set point. This valve is made of brass and stainless steel for superior durability and is highly resistant to rust and corrosion. This safety valve is ideal for applications where reliable pressure relief is required. It is easy to install and maintain, making it a great choice for any system. FleetPride is your First Click in Heavy Duty®.