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Compact white diaphragm pump with three chambers, hose fittings and pressure switch on top

VEVOR

VEVOR NMDPA33-G33-45-110 110V 3.3GPM 45PSI Diaphragm Pump specialty appliance

SKU CH-H4T4-P7JX9 MPN NMDPA33-G33-45-110

110V diaphragm pump delivers 3.3 GPM at 45 PSI with automatic pressure switching and self-priming to 6 feet

  • TypeOther Appliances
  • Width7.09
  • 3 GPM open flow meets high water demand
  • 8 m self-priming lift draws from low sources
  • 40-80 PSI adjustable switch auto-starts with faucet use
  • FCC certified Santoprene diaphragms prevent electric leakage
  • 1 lb glass-fibre housing installs in tight RV spaces

VEVOR 110V 3.3GPM Diaphragm Pump

This 110V diaphragm pump delivers an open flow rate of 3.3 GPM and a rated pressure of 45 PSI, adjustable between 40 and 80 PSI. It self-primes up to 6 feet and uses a 1.6A motor for consistent water delivery. The three-chamber Santoprene diaphragm design suits RV, camper, marine and lawn applications. FCC certification confirms compliance with electrical safety standards.

Installation and Common Issues

The pump includes 1/2 inch MNPT inlet and outlet ports, two hose adapters, sealing tape and a hex wrench for straightforward plumbing connections. Wiring is simple 110V/60Hz mains input at 1.6A. Ensure the pump is mounted securely to minimise vibration noise. A frequent oversight is neglecting the supplied filter, which can allow debris to damage the EPDM valves. Dry-running for extended periods may also shorten diaphragm life despite short-term tolerance.

Pre-Order Checks

Verify that your system operates on 110V/60Hz power and can supply a dedicated 1.6A circuit. Confirm the 1/2 inch MNPT thread size matches your existing hose or piping. Check that the adjustable pressure range of 40 to 80 PSI meets your fixture requirements. Ensure the mounting location accommodates the 9.17 by 5.59 by 4.91 inch dimensions and allows access for filter cleaning. Liquid temperature must not exceed 140°F and ambient temperature must stay within 32 to 140°F.

Highlights

  • 3 GPM open flow meets high water demand
  • 8 m self-priming lift draws from low sources
  • 40-80 PSI adjustable switch auto-starts with faucet use
  • FCC certified Santoprene diaphragms prevent electric leakage
  • 1 lb glass-fibre housing installs in tight RV spaces

Specifications

TypeOther Appliances
Width7.09

Questions about this item

How can I verify the pump is operating correctly after installation?

Open a faucet and confirm the pump starts automatically, delivers steady water flow, and shuts off when the faucet closes; the pressure switch is factory-set to 45 PSI and adjustable between 40 and 80 PSI.

What components are included and what must I supply separately?

The box contains the diaphragm pump, a filter, two 1/2" MNPT hose adapters, a hex wrench, and sealing tape; you will need to provide 110 V power and suitable hose or piping for the inlet and outlet.

Which pressure setting should I select for my RV or marine system?

Start at the factory 45 PSI setting; if your fixtures require lower or higher pressure, adjust the switch within the 40–80 PSI range to match the system’s recommended operating pressure.

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