BACKFLOW DIRECT RK-D-4200 2ND CHECK ASSEMBLY

The 2" - 4" Second Check Valve Assembly can be used on the Deringer 20-50 and Magnum 20 & 40 models for sizes 2", 2 1/2", 3" and 4" and comes pre-assembled from the factory ready for installation. Note: This check valve assembly is for the 2" - 4" Deringer 20-50 models and 2" - 4" Magnum 20 & 40 models only. The first and second check valves are not interchangeable.