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Hendrickson Bros Mini Pressure Regulator

Hendrickson Bros Mini Pressure Regulator

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This small 1/2" NPT mini pressure regulator, by Hendrickson Bros, can be used to retrofit existing sprinkler heads to low volume, water saving, drip irrigation. Easy to install on a 1/2" riser or pipe thread fitting. This unit has a built in check valve which opens at 25 PSI then regulates the system to the pre-set pressure and closes at system shut down when pressure drops to 10 PSI. Always install pressure regulators downstream from all shut-off valves. Be sure to install pressure regulators in the proper direction. The arrow on the housing shows the direction of the flow and should always point downstream toward emitters.


  • Inlet: 1/2" FPT
  • Outlet: 1/2" MPT
  • Built in check valve opens at 25 PSI and closes at 10 PSI
  • Operating Pressure Range: 20 - 100 PSI
  • Flow Range: .1 - 4 GPM
  • Available in 20 PSI and 30 PSI models
  • Applications: Converting sprinkler risers to drip, greenhouses and nurseries
Please note: Irrigation pressure regulators need outflow and back pressure to regulate the pressure within your irrigation system. With no water flowing through the regulator, the inlet and outlet pressures will measure the same. To verify the pressure maintained in your system, you will need to place a pressure gauge at the end of one of zones, turn the zone on, let it pressurize and once the lines have filled and emitters begin to flow then take the reading. This will reflect the working pressure within your system.
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