About this task
Before you start equipment, manually flush the valve to remove any foreign material from the valve.
Procedure
- Turn the adjusting screw clockwise, to raise the adjusting screw away from the valve body as much as possible. See Figure 1. Count the number of turns for reference.
- Insert a standard slotted screwdriver tip between the adjusting screw and the push pin.
- Pry the push pin down with the screwdriver to open the valve as indicated.
- Hold the push pin down to hold the valve open. Flush the valve for several minutes, to remove all foreign matter from the V43/V243 valves.
- After you flush the V43/V243 valves, remove the screwdriver and set the adjusting screw to the desired operating pressure. See Adjusting the valve.