Emerson Fisher Type R622 1/2 in. FNPT Aluminum Second Stage Regulator w/ 9-13 in. w.c. Spring, 875K BTU/HR

Emerson Fisher
1/2 in.
875,000 BTU/hr.
Product Type:
Second Stage
3.00 LBS
Adding to cart… The item has been added
The Type R600 Series second-stage regulators are UL listed designed to reduce the outlet pressure from a first-stage regulator in domestic installations, usually 10 psig. Type R622 is designed for Two-Stage domestic applications up to 1,400,000 BTU per hour and contains a high performance relief valve and a large 3/4-inch screened vent to limit downstream pressure to less than 2 psig in an overpressure situation as required by NFPA 58.


  • 20-Year Recommended Replacement Life: The Type R622H is designed using rugged time proven design concepts with enhancements to the corrosion resistance and durability of materials both internally and externally - With proper installation and periodic inspection and maintenance the Type R622H design has a 20-Year Recommended Replacement Life - In some environmental conditions earlier replacement may be required
  • Improved Regulations: Fisher's large molded fabric-reinforced diaphragm and spring assisted vent stabilizer deliver accurate, stable regulation
  • Superior Overpressure Protection: The combination of a high capacity relief valve and large vent provide overpressure protection which exceeds UL standards - when used in conjunction with a Type R622 or R652 the two-stage system will limit the downstream pressure from the second-stage to 2 psig (0,14 bar) even in a double failure situation
  • Easy System Checks: 1/8 inch NPT inlet and outlet gauge taps orificed to a number 54 drill sized are easily accessible for gas system checks.
  • Corrosion-Resistant: Added corrosion resistance with an internal and external coating process for all castings prior to painting, stainless steel relief valve spring and retainer and a non-corrosive relief valve seat
  • Positive Drainage: When installed properly with the spring case pointed down the Fisher Positive Drainage design allows any moisture formed in the spring case to drain out eliminating the problems with corrosion and freezing of the water in the spring case


  • Capacity (Propane): 875,000 BTU/HR (9.8 SCMH)
  • Inlet Connection: 1/2 in. FNPT
  • Outlet Connection: 1/2 in. FNPT
  • Material: Aluminum
  • Maximum Inlet Pressures: 10 psig (0,69 bar)
  • Emergency Inlet Pressure: 50 psig (3,4 bar)
  • Outlet Pressure Ranges: 9 to 13 in. w.c. (22 to 32 bar)
  • Outlet Pressure Setting: 11 in. w.c. (27 bar)
  • Temperature Capabilities: -20° to 160°F (-29° to 71°C)
  • Certifications: UL, CRN
  • Color: Palm green, for easy identification


Warning: Failure to follow the instructions or to properly install and maintain this equipment could result in an explosion and/or fire causing property damage and personal injury or death. Fisher® equipment must be installed, operated and maintained in accordance with federal, state and local codes and Fisher instructions. The installation in most states must also comply with NFPA No. 54 and 58 standards. Only personnel trained in the proper procedures, codes, standards and regulations of the LP-Gas industry should install and service this equipment. Buyer agrees that responsibility for proper selection, installation, use and maintenance of any product remains solely with the purchaser and end-user. Buyer agrees to comply with the above warning and all instruction manuals, bulletins and installation guides associated with this product.


Product Manual (PDF Download)

Product Bulletin (PDF Download)

Product Schematic (PDF Download)