The Fisher R222 second-stage regulator is designed to reduce the outlet pressure from a first-stage regulator in domestic applications. Inlet and outlet gauge taps allow for easy system testing. The combination of a high capacity relief valve and large vent provide overpressure protection that exceeds UL standards. When used in conjunction with an R122H or R622H, the two-stage system will limit the downstream pressure to 2 psig even in a double failure situation.

Maximum inlet pressure is 10 psig (0.69 bar) with propane flow capacities up to 650,000 BTU/hr. Inlet and outlet connections are 1/2in female NPT. The vent is 3/8in NPT screened. Operating temperature range is -20 to 160°F (-29 to 71°C) with a 20-year recommended replacement life. UL listed and CRN certified.

Fisher equipment must be installed, operated and maintained in accordance with Federal, state, and local codes and Fisher instructions. Only personnel trained in the proper procedures, codes, standards and regulations of the LP-gas industry should install and service this equipment.