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General Pump YUW21235 Brass 21 GPM Trapped Pressure Unloader with White Spring - 2600 PSI

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2.37 lbs
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Brass body pressure unloading device with a pressure spring. 1/2" ports and bypass. Max 21 GPM, Max 2600 PSI.

Technical Specifications

Inlet Port: 1/2 inch
Max GPM: 21
Max PSI: 2600
Max Temperature: 200 degrees F

Product Description

Dual Gun  or Pump Unloader

This General Pump YUW21235 pressure sensitive regulating unloader is designed for single or multiple pump, weep or multi-nozzle systems. It has (2) 1/2" NPTF inlet, a 1/2" NPTF outlet, and a 1/2" NPT-F bypass. This quality pressure unloader can handle up to 21 GPM and 2,600 PSI (Rated at 2,300 at 21 GPM).

This unloader maintains set system pressure and goes into by-pass with the release of the trigger or an obstruction downstream. Pressure is held in the line during by-pass with full pressure when the gun is opened or the obstruction cleared and minimal pressure fluctuation with the alternating use of multiple guns. 5-10% by-pass is necessary for optimum performance.

Specs and Details:

  • 21.0 GPM
  • 2600 PSI maximum pressure
  • 1/2" NPT female inlet port
  • 1/2" NPT female outlet port
  • Brass housing
  • 200° Fahrenheit
  • White spring


  • New improved design
  • Easier gun operation
  • Extremely reliable
  • Easy maintenance


  • 7.57" x 3.96" x 1.5"

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