This is a pressure-actuated regulator that is designed for any that fits within the flow and pressure range of the regulator.  The regulator determines the direction of the flow in the system and maintains system pressure via an adjustable nut that controls the amount of tension on a pressure spring.  When the water flow stops, it is diverted through the bypass port at virtually no pressure.  The regulator is capable of handling one or more shut-off guns and should be run with no bypass (if the full flow from the pump is going through the regulator).  It actuates at around 10% above the system pressure.

WARNING: This product might contain a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov

  • Giant Industries Limited Warranty
  • 22191-D Literature


U.S. Metric
Flow 66 GPM 250 L/min
Pressure (Maximum) 4060 PSI 280 bar
Continuous Temperature of Pumped Fluids 140 ºF 60 ºC
Inlet 1″ FBSP
Outlet 1″ FBSP
Bypass 1″ MBSP
Weight 4.1 lbs 1.9 kg


Repair Kit – Part #09236
3 16144 Plunger 1
11 16152 O-Ring 1
12 16153 O-Ring 1
111 16156 Guide Ring 1

Repair Kits Available

The repair kits listed to the right are available for this pump. If you need further information about these repair kits, or have questions about other specific parts for your pump, please contact you local Giant distributor or contact Giant customer service.

Service & Repair

Giant provides service on each pump and accessory that we sell. Many basic repair procedures are covered in the Giant repair manual. For all other questions on service or repair needs please contact your local Giant distributor.