Jabsco Water Pump Par-Max 4.0 HD 12 Volt Q401J-115S-3A 4.0 GPM 15.2 LPM 40 PSI

$325.34 inc GST

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Jabsco Water Pump Par Max 4.0 HD- 12 Volt Q401J-115S-3A 4.0 GPM 15 litre

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Jabsco Water Pump ParMax 4.0 HD 12 Volt Q401J-115S-3A 4.0 GPM 15.2 litre per minute 40PSI

These Heavy Duty (HD) Par-Max 4 freshwater pressure pumps offer robust construction and high performance.

These new modern design pumps have a 4 chamber quad design pump head and this model offer pressure up to 40PSI.

These heavy Duty (HD) models include a heavy duty wider diameter motor with a powder-coated shell, cast aluminium end bells and lower housing – to improve pressure capability and offer longer life and exceptional performance.

The ideal robust heavy-duty pump for providing freshwater automatically to up to 4 outlets on pleasure craft up to approx the 13 metre (40 Ft) range.

Includes a 40 mesh plug-in inlet strainer in the box with the pump. HD Quad 4 chamber automatic pressure pump gives flow up to 4 US Gallons per minute (15.2 litres per minute) and pressure up to 60 PSI.

Serves up to 4 x 12mm outlets including galley, shower and additional faucet.

The Par-Max 4.0 HD gives very smooth water flow even at low demand due to its built-in pulsation dampening by-pass valve which controls unwanted cycling and reduces noise.

Inlet filter, corrosion-resistant motor, soft rubber vibration-dampening mounts and quick connect plug-in hose ports included – 2 x 12mm barbed for hose.

This new pump released in 2022 replaces Jabsco Par Max 4 Pressure Water Pump 31620-0092 J20-110 12 volt 4.3 GPM 12 volt 40 PSI cut-out pressure (2.8 bar)


Product Sheet: Par-Max Series_brochure


Kit includes: 

  • 1 x Par-Max HD4 Freshwater Pump
  • 2 x 1/2″ (13mm) straight hosebarbs
  • 1 x 40 mesh inline quick connect strainer

Features and Benefits –

  • Fully automatic operation with built-in pressure switch
  • Pressure switch 40PSI cut off
  • Up to 15.2 litres 4 US gallons per minute flow
  • Serves up to 4 x 12mm (1/2”) outlets on board simultaneously
  • Modern 4 chamber design gives smooth flow and quiet operation
  • Built-in internal by-pass lowers water pulsation
  • Self primes to 2.4 metres (8 feet)
  • Can be installed vertically or horizontally
  • Can be run dry for short periods without damage
  • Powerful heavy duty ignition protected motor with thermal protection TCO
  • Vibration dampening base plate & feet for quiet efficient operation
  • Available in both 12 volt & 24 volt in both 40PSI & 60PSI versions
  • High Quality
  • 3 year warranty
  • World Leading Brand

Par-Max HD4

Overall length   9.4in (239mm)

Overall width    4.1 in (104mm)

Overall Height 3.8in (97mm)

Motor Height   3.5in (89mm)

Mounting Length CTR to CTR 2.0in  (51mm)

Mounting Width CTR to CTR 3.6in (91mm) (CTR – centre of mounting hole)


•  Model J20-210 Jabsco 4.3 GPM 2022 new release version

•  12 volt

•  15.2 l/m 4 US Gallons per minute

•  Max Current  10.0 Amps

•  15 amp Fuse

•  Thermal Overload

•  Quick connect ports for ease of installation, servicing, and maintenance

•  Meets USCG and ISO 8846 Ignition Protection Standards

•  Can be installed vertically or horizontally

Motor Design Brushed, permanent magnet TENV
Pumphead upper housing material Fiber reinforced polypropylene
Diaphragm Santoprene
Check Valves EPDM
Max Inlet Pressure 30 PSI (2.1 Bar)
Fluid Temp Range 32°F – 140°F (0°C – 60°C)
Dry Self-priming Capability 8ft min (2.4m min)
Certifications CE, ISO8846, RCM
Water Ingress protection IPX6
Warranty 3 years

Electric Water Pumps The PAR-MAX Automatic Water System Pump is designed for self-contained boats and RV’s with multiple fixture water systems. The system operates automatically. When a fixture is opened, the pump instantly begins operation to provide a smooth constant flow from tank to faucet. Closing the faucet automatically discontinues pump operation.


The PAR-MAX pumps are self-priming and may be located above or below the fresh water tank in a dry location. To vertically mount these units, it is best to do so with the motor on top. This will prevent water dripping on motor in the event of a leak. Place pump on a solid surface and secure with four mounting screws (not included) being careful not to compress the rubber grommets which act as shock absorbers.


Select two of the port adaptors supplied to match your plumbing system. Flexible potable water hose or PEX tubing is recommended instead of rigid piping at pump. If you choose to use rigid piping, provide a short length of hose between pipe and the pump to avoid noise and vibration. Use clamps at both ends of hose to prevent air leaks into the water line. NOTE: Intake hose must be minimum 1/2″ (13 mm) ID reinforced hose. Main distribution line from pump outlet should also be 1/2″ (13 mm) ID with branch and individual supply lines to outlets no smaller than 3/8″ (10 mm). A Jabsco “Pumpgard” in line strainer should be installed between pump and tank to keep debris out of pump and system. Fresh water tank must be vented. Avoid any kinks or fittings which could cause excessive restrictions. Remember to periodically clean faucet and “Pumpgard” screens.


In an easily accessible location, install a switch (Jabsco 44960-Series) to control electricity to the pump. Turn the pump off when not used for extended periods or when the tank is empty. The electrical circuit should be protected with an overcurrent protection device in the positive lead. See chart for proper size. The pump circuit should not include any other electrical loads. The free lead at the pressure switch is positive. Black wire from the motor is negative. Select wire size from chart below. Use total length of wire from the battery to pump and return. Chart allows for 3% voltage drop. If in doubt, use next larger wire size.

Additional information

Additional information





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$11.60 Brisbane Express - Postcodes 4000-4209, 4270-4299, 4500-4549, 9000-9725 up to 20kg

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Boat Hut has approx 100,000 product lines coming from a number of warehouses across Australia.
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