Pressure reducing valves are for automatic control of hot water
boiler make ups and other pressure reducing applications.
The Fillmaticô valve is factory set for 12 psi (83 kPa). To
change this setting, loosen the jam nut. Then turn the hex
head adjusting screw clockwise to increase the set pressure
or counterclockwise to lower the set pressure. When the
desired pressure is obtained, tighten the jam nut while holding
the adjusting screw stationary.