Kit 9910-Kit1920 replaces valves on the Hypro D50 pump. 4 Complete Valve Assemblies (9910-659050). 4 O-Rings (9910-320030).
Editorial Reviews:
The Hypro valve repair kit 9910-Kit1920 is used to replace worn or damaged valves on the D50 diaphragm pump. An indication that the valves of your pump need replacement is a drop in volume (flow) and/or engine-knock type sounds coming from your pump. Kit 1920 includes 4 Complete Valve Assemblies, and 4 O-Rings.