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Low Pressure Shut Off Switch 1/8" Male NPT

Part Number: LPS340-G
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Low Pressure Switch (LPS) installs on the inlet side of the booster pump and will shut-off the pump if the feed water is interrupted. Switch remains closed at 5 PSI or more, when pressure drops below 5 PSI, Switch will open and cut-off the power to the pump. Requires wire harness # 21-028 (sold separately).

For Delivery Pump (Demand Pump) applications involving a pressurized bladder tank (ie RO Tank), a Low Pressure Switch is recommended to shut-off the Delivery Pump in the event the RO tank runs empty, thus preventing damage to the bladder and the tank from cavitating. When Delivery Pumps are used to pull water from an RO Bladder tank, the tank pre-charge is typically reduced to 1 psi to increase water storage volume.

  • Material: Wetted parts are FDA Approved or NSF listed
  • Connection: 1/8" Male NPT thread
  • Pressure Switch Closed: @ 5 PSI or more
  • Pressure Switch Opened: 1 - 5, Preset @ 2.3 PSI
  • Electrical: 125 - 250 VAC, 15A Max.
  • Power: Compatible with 110V or 220V transformers
  • Sustained Operating Pressure: 50 PSI Max.
  • Top Terminal: Common Lead
  • Middle Terminal: Normally Open Lead
  • Bottom Terminal: Normally Closed Lead
  • Accessories: Wire Harness # 21-028 to connect to pump and transformer

California residents Prop 65 Warning
This product contains materials known to the State of California to cause cancer and birth defects or other reproductive harm. www.p65warnings.ca.gov