Ritchie Part Number 13597 - Green Valve 1/2" for HIGH PRESSURE 60-80 psi. Pictured as #8 in the parts diagram for the Ritchie WaterMatic 150. The water pressure of your installation may require you to change which valve you are using.

NOTE - The red valve 12575 is the standard valve that comes from the factory for the WaterMatic 150.