Speedaire 6D918 In-Tank Check Valve 3/4 FPT Inlet 1 MPT Outlet

Speedaire 6D918 In-Tank Check Valve is a unidirectional flow device designed for installation inside a tank. It provides a 3/4" FPT inlet and a 1" MPT outlet, allowing connection to standard pipe fittings in tank systems. As a check valve, it enables flow from the inlet toward the outlet while preventing reverse flow, helping to protect pumps and maintain tank integrity by stopping backflow. The compact in-tank configuration fits in tight spaces where an external valve assembly is not practical, ensuring a robust one-way seal within the tank environment. The 3/4" FPT inlet and 1" MPT outlet reflect common pipe-thread sizing, facilitating compatibility with a wide range of fittings used in tank installations. Part number 6D918 identifies this specific valve from Speedaire.