Castair Pilot Valves Adjustable pilot valves with a hex brass body and full external adjustment of pressure and differential. 40-250 PSI range available, corrosion resistant. Available in gas (HU) and electric (DC) versions. Features Hex brass body. Full external adjustment: pressure & differential. 40-250 PSI range available. Corrosion resistant. Specifications Pilot Valves PSI Range Inlet″ Outlet″ Type Part # 100-120 PSI 1/4″ NPT 1/8″ NPT Gas (HU) RCBM100HU 100-120 PSI 1/4″ NPT 1/8″ NPT Electric (DC) RCBM100DC 140-170 PSI 1/4″ NPT 1/8″ NPT Gas (HU) RCBM140HU 140-170 PSI 1/4″ NPT 1/8″ NPT Electric (DC) RCBM140DC HU = gas · DC = electric.