Hypro D503 Valve Kit
Hypro 9910-Kit1987 is the replacement valve kit for the Hypro D503 diaphragm pump. Pump valves may become worn over time which will affect the pump performance. A common symptom of a bad valve is excessive pulsation in the suction and agitation lines.
9910-Kit1987 comes with six valve assemblies (9910-1409050) and twelve replacement o-rings (9910-620030 & 9910-504361).
Other kits available for the D503 pump are the diaphragm kit (9910-Kit1881) and o-ring kit (9910-1984).