For PRESSURE SWITCH CONTROLLED PUMPS with traditional pressure differential of up to 140kPa (20psi), pre-charge to be 20kPa (3psi) below cut in pressure. Once the pre-charge is set, no regular air charge checks are required.

For pumps controlled by either pressure switches with a differential over 140kPa (20psi), ELECTRONIC CONTROLLERS OR VFD (Variable speed Drive) the pressure should be set at 65% of the maximum system pressure. Once the pre-charge is set, no regular air charge checks are required.


  • HYJET diaphragm pressure tanks are ideally suited for a wide range of general applications including pump booster systems, thermal expansion, irrigation systems and to limit water hammer.

Features & Benefits

  • Single diaphragm design 100% potable quality butyl.
  • Patented 316 stainless steel connection.
  • Virgin polypropylene liner, so no water touches plain steel.
  • Internal clench ring becomes more secure at higher pressures.
  • High quality two part polyurethane, epoxy primed paint finish – Almond.
  • Brass stemmed air valve and O–ring sealed valve cap.
  • NSF standard 61, CE / PED, WRAS approvals.
  • Maximum temperature up to 90 °C.
  • Standard maximum pressure 150 PSI / 10 Bar.
  • 5 Year Warranty

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