These are flow-actuated valves which control the flow of the water to the nozzle(s).  During bypass mode, all of the water is directed back to the supply.  Since the pressure is relieved in the discharge line, high-pressure fluid is not trapped in the discharge portion of the system.  The great advantage of this is that it is easier to start up the system again and provide additional safety because an operator does not feel the “kick” when a gun is engaged as the pressure develops in a few seconds (as opposed to immediately with a pressure-actuated valve). This valve is typically used for applications which require frequent on/off action, such as pressure washers.  They are not designed for multi-gun operations. Flow ranges are from 1.5 GPM (5.7 l/min) to 13 GPM (49 L/min) and pressure range is from 0 PSI to 15,000 PSI (to 1000 Bar).  Metal materials are forged brass and stainless steel and elastomers will be either Nitrile or Viton.

Model FlowPressureInletDischargeBypass
22648 1.5-4.0 GPM
5.7-15 bar
0-3000 PSI
0-207 bar
3/8" FNPT 3/8" FNPT 3/4" MNPT
22648A 1.5-4.0 GPM
5.7-15 bar
0-3000 PSI
0-207 bar
3/8" FNPT 3/8" FNPT 3/4" MNPT
22650 3.0-4.5 GPM
12-17 bar
0-3000 PSI
0-207 bar
3/8" FNPT 3/8" FNPT 3/4" MNPT
22650A 3.0-4.5 GPM
12-17 bar
0-3000 PSI
0-207 bar
3/8" FNPT 3/8" FNPT 3/4" MNPT
22654A 3.5-4.8 GPM
13-18 bar
3000-4000 PSI
207-276 bar
3/8" FNPT 3/8" FNPT 3/4" MNPT
22655 3.0-5.5 GPM
12-21 bar
0-3000 PSI
0-207 bar
3/8" FNPT 3/8" FNPT 3/4" MNPT
22656 4.5-6.5 GPM
17-25 bar
0-3000 PSI
0-207 bar
3/8" FNPT 3/8" FNPT 3/4" MNPT
22665 13 GPM
49 L/min
7250 PSI
500 bar
1/2" FBSP 1/2" FBSP 1/2" MBSP
22675-F26 13 GPM
49 L/min
15,000 PSI
1034 bar
F26 x 1.5 F26 x 1.5 1/2" BSP
22675-M08 13 GPM
49 L/min
15,000 PSI
1034 bar
M24 x 1.5 M24 x 1.5 1/2" MNPT
22675-M24 13 GPM
49 L/min
15,000 PSI
1034 bar
M24 x 1.5 M24 x 1.5 1/2" BSP
ACCESSORIES
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.