Ritchie Part Number 16697 - White Valve 3/4" for LOW PRESSURE 5-40 psi. Pictured as #7 in the parts diagram for the Ritchie OmniFount 3. The water pressure of your installation may require you to change which valve you are using.

NOTE - The green valve 15377 is the standard valve that comes from the factory for the OmniFount 3 to ensure adequate fill rate.