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12V Automatic Small Flow Pressure Pump -Jabsco 4 Litre Par-Max 1


Can handle pressure up to 35PSI with 4 LPM flow. Consistent water pressure to handle up to 2 taps or outlets at one time.

SKU: J20-099 Categories: , ,
Additional information

Jabsco 4L Par-Max 1 Freshwater Automatic Pressure Water Pumps

The 12V automatic small flow pressure pump is a very reliable miniature multi-outlet water pressure pump serves one or two 3/8″ (10mm) outlets at any one time.

Theses freshwater pumps will automatically turn on when a fixture is opened and turn off when all fixtures are closed as it has automatic demand with 35 PSI pressure switch.

This 12V automatic small flow pressure pump is perfect for small boats, caravans and campervans with battery or solar set-up.

  • 10mm (3/8”) barbed inlet and outlet – also supplied with 2 adaptor bushes to convert the inlet/outlet barbs to ½” 12mm barbs.
  • 35 PSI Switch
  • 3 LPM (1.1 GPM) at open flow
  • Self priming to 1.2m (4ft)
  • Can be run dry without damage
  • 2 chamber dual diaphragm operation
  • Thermal overload protection automatically stops motor should it overheat due to overload, with auto restart feature
  • Pressure switch cut-in at 22 psi (1.5 bar), cut-out at 35 psi (2.4 bar)
  • Ignition Protection
  • Three-year warranty


A typical installation of a Jabsco Par-Max DC Pressure Pump

The Jabsco 12V automatic small flow pressure pump comes with installation instructions included in the box. Please read and follow the instructions.

  • Model: 42630-2900
  • LPM: 4.3
  • Up to 50 psi / 3.5 bar
  • Max Amp Draw: 1.9 @ 10 PSI
  • Pump Fuse: 4 Amp
  • Cut in Pressure: 22 PSI/1.5 bar
  • Cut-out Pressure: 35 PSI/2.4 bar


Accessories (not included)

Accumulator Tanks

Jabsco accumulator tanks used in pressure pump systems

Accumulator tanks hold a reservoir of air and water down stream from the pump. The air acts as a cushion, absorbing pump and pressure fluctuations, smoothing the flow and making the system quieter. Accumulators allow the pump to reach shut-off pressure more smoothly which reduces the on/off cycle which gives better control of hot water delivery.
Our accumulator tanks all have a bladder that separates water from air. The bladder is pre-pressurised but may need fine tuning when installed to give the most efficient performance. One of the advantages of an accumulator tank is that they can dispense up to half of their capacity of water even when the pump is switched off. So the bigger the reservoir, the more water you have available without having to switch the pump on helping you wash your hands or clean your teeth without noise.


Jabsco Water Pressure Regulator

Water Pressure Regulators

Inlet water regulators are designed to protect your boat water system plumbing and fixtures from the possible high pressure of municipal water systems. Regulation is controlled at all flow rates by a pre-set spring and removable strainer traps debris. Both inline portable and permanent flush mount models are available in our new line of diaphragm sealed regulators.

Jabsco PumpGuard Strainer plug-in with half inch male thread


PumpGardTM Strainers
Inlet Strainers are an essential part of any fresh water system using a diaphragm pump – protecting the valves from small particles in the water. Our Pumpgards™ have been designed for easy installation
and rapid filter screen cleaning having a transparent bowl that screws off to allow simple, regular inspection.




3 Years