These safety devices help to protect a pump by removing hot water that is present on the inlet side of the high pressure pump, which allows cooler water to remain.  They work in an automatic manner and automatically reset as the temperature falls below the set point.  The key benefit of the thermal relief valve is that it allows an operator to run a unit in a bypass mode for an extended period,which reduces the changes of premature seal wear on the high pressure pump.

Model Fitting Size
23420B 1/4"
23421B 3/8"
23422B 1/2"
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.