PAR-MAX 4 HD 12V Fresh Water Pump | 15.2LPM 60PSI

💧 JABSCO PAR-MAX 4 HD 12V FRESH WATER PUMP – 15.2LPM / 60 PSI

Heavy-Duty High-Pressure 4-Chamber Automatic Pump for Caravans, RVs & Marine Fresh Water Systems

💦 The Jabsco PAR-MAX 4 HD 12V Fresh Water Pump is a heavy-duty automatic pressure pump designed for larger caravan, RV and marine systems requiring strong flow, higher pressure and reliable multi-outlet performance.

Delivering up to 15.2 litres per minute with a 60 PSI pressure-switch cut-off, this high-pressure version of the PAR-MAX 4 HD is designed to provide strong water delivery across systems incorporating up to four 12mm outlets.

Its modern quad four-chamber diaphragm pump head delivers smooth water flow even at lower demand, while the built-in pulsation-dampening bypass valve helps control rapid cycling, reduce water pulsation and minimise pump noise.

The heavy-duty design incorporates a wider-diameter motor with a powder-coated shell, cast aluminium end bells and lower housing, providing increased durability and pressure capability for demanding fresh water installations.

A 40-mesh plug-in inlet strainer, soft vibration-dampening mounts and two 12mm barbed quick-connect hose fittings are included, making the PAR-MAX 4 HD a comprehensive solution for high-performance automatic water systems.

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⚡ KEY FEATURES

💦 High-Flow 15.2LPM Performance
Provides up to 15.2 litres per minute for showers, galley taps and larger multi-fixture water systems.

📈 High-Pressure 60 PSI Cut-Off
Designed for compatible systems requiring stronger water pressure than standard 40 PSI pump configurations.

🚿 Supports Up to 4 Outlets
Designed to supply up to four 12mm / 1/2" water outlets including showers, galley taps and additional faucets.

🔄 Heavy-Duty Quad 4-Chamber Pump Head
Modern four-chamber diaphragm construction provides smooth flow, strong performance and quiet operation.

⚙️ Fully Automatic Operation
The built-in pressure switch automatically starts and stops the pump according to water demand.

🔄 Built-In Pulsation-Dampening Bypass
Helps reduce rapid cycling and smooth water delivery when only a small amount of water is being used.

💧 Self-Priming to 2.4 Metres
Can draw water from a tank located below the pump within its stated 2.4m / 8ft self-priming capability.

🛡️ Short-Term Dry-Run Protection
Can run dry for short periods without damage if water supply is temporarily interrupted.

🔥 Ignition-Protected Heavy-Duty Motor
Suitable for compatible marine and mobile applications where ignition-protected equipment is required.

🌡️ Thermal Protection
Includes thermal protection / TCO to help safeguard the motor against excessive operating temperature.

🔇 Vibration-Dampening Base & Feet
Helps reduce transmitted vibration and pump noise through caravan floors, cabinetry and boat structures.

🧺 40-Mesh Inlet Strainer Included
Helps protect the pump from larger contaminants entering through the fresh water supply.

🔧 2 × 12mm Barbed Hose Fittings Included
Supplied with two 12mm / 1/2" quick-connect barbed hose fittings.

↕️ Vertical or Horizontal Mounting
Can be installed vertically or horizontally to suit different mounting spaces.

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🚿 DESIGNED FOR HIGH-DEMAND MULTI-OUTLET SYSTEMS

The PAR-MAX 4 HD is ideal for larger water systems where several fixtures need to be supplied from one automatic pressure pump.

A typical four-outlet installation may include:

• 🚰 Kitchen / galley tap
• 🚿 Internal shower
• 🚰 Bathroom basin
• 🚿 External shower or additional faucet

With up to 15.2LPM available, the HD4 provides significantly more flow capacity than a compact single-outlet or 11LPM-class pump.

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💦 15.2LPM HIGH-FLOW PERFORMANCE

Maximum Flow: 15.2 Litres Per Minute

The additional flow capacity makes the PAR-MAX 4 HD particularly useful when more than one fixture may be used at the same time.

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📈 60 PSI HIGH-PRESSURE VERSION

This specific PAR-MAX 4 HD model features a 60 PSI pressure-switch cut-off.

The higher pressure capability makes it suitable for compatible systems where stronger water pressure is required.

It may also provide improved pressure stability across longer or more restrictive plumbing systems, provided the complete installation is designed for the pressure.

⚠️ IMPORTANT: 60 PSI is relatively high pressure for some caravan and RV plumbing. Confirm that every hose, tap, mixer, filter, fitting and water-heating appliance is rated for the pump's pressure before installation.

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🔄 SMOOTH QUAD 4-CHAMBER DESIGN

The heavy-duty pump head uses four diaphragm chambers to provide smooth, consistent water delivery across varying demand.

The quad design helps provide:

• 💦 High-volume flow
• 📈 Strong pressure performance
• 💧 Smooth water delivery
• 🔇 Reduced operating noise
• 🚿 Improved multi-fixture performance

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🛠️ HEAVY-DUTY MOTOR CONSTRUCTION

The PAR-MAX HD series is built around a more substantial motor and housing arrangement designed to support increased pressure capability and demanding operation.

Construction features include:

• ⚙️ Wider-diameter heavy-duty motor
• 🛡️ Powder-coated motor shell
• 🔩 Cast aluminium end bells
• 🔩 Cast aluminium lower housing
• 🔥 Ignition protection
• 🌡️ Thermal protection / TCO

This makes the HD4 particularly attractive for systems where the pump will be used regularly and strong performance is a priority.

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⚙️ FULLY AUTOMATIC ON-DEMAND WATER PRESSURE

The PAR-MAX 4 HD incorporates a built-in pressure switch for automatic operation.

When a tap opens, water pressure falls and the pump automatically starts.

Once the tap closes and system pressure builds to the 60 PSI cut-off point, the pump automatically stops.

This provides convenient household-style operation throughout the fresh water system.

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🔄 BUILT-IN BYPASS FOR SMOOTHER LOW-FLOW OPERATION

The internal pulsation-dampening bypass valve helps manage smaller water demands without repeatedly switching the pump on and off.

This can provide:

• 💧 Smoother low-flow operation
• 🔄 Reduced rapid cycling
• 🔇 Less repetitive pump noise
• ⚙️ Improved pressure stability

The bypass is particularly useful when a tap is partially open or a lower-flow fixture is being used.

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💨 DO I NEED AN ACCUMULATOR TANK?

The built-in bypass is designed to reduce water pulsation and rapid cycling, which can reduce the need for a separate accumulator tank in many installations.

An accumulator may still offer benefits in certain specialised system layouts, but it is not described as necessary for normal PAR-MAX 4 HD operation.

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💧 SELF-PRIMING TO 2.4 METRES

The pump can self-prime to approximately 2.4 metres / 8 feet of vertical lift.

This provides considerable flexibility when positioning the pump above or away from the fresh water tank.

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🛡️ SHORT-TERM DRY-RUN CAPABILITY

The PAR-MAX 4 HD can run dry for short periods without damage.

This provides useful protection if:

• 💧 The fresh water tank runs empty
• 🔧 Water supply is temporarily interrupted
• 🚐 The system needs to re-prime after refilling

⚠️ Dry-run capability is designed as protection against temporary loss of water. Avoid intentionally operating the pump dry for extended periods.

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🔇 QUIET, VIBRATION-DAMPENED OPERATION

Despite its high-flow and high-pressure capability, the PAR-MAX 4 HD is designed for smooth and quiet operation.

Noise reduction is supported by:

• 🔄 Quad four-chamber diaphragm design
• ⚙️ Internal bypass control
• 🔇 Vibration-dampening base plate
• 🔇 Soft mounting feet
• 💧 Reduced low-flow cycling

Mounting the pump to a solid surface and avoiding rigid plumbing directly beside it can help reduce transmitted noise further.

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🧺 40-MESH INLET STRAINER INCLUDED

A 40-mesh plug-in inlet strainer is included with the pump.

The strainer helps prevent larger debris from entering the pump and interfering with the diaphragm or valve assembly.

It can also be removed periodically for inspection and cleaning.

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🔧 QUICK-CONNECT 12MM HOSE FITTINGS

Two 12mm / 1/2" barbed plug-in hose fittings are supplied with the pump.

The quick-connect system helps simplify:

• 🔧 Initial installation
• 🛠️ Pump servicing
• 🧺 Inlet strainer maintenance
• 🚐 Future pump replacement

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↕️ VERTICAL OR HORIZONTAL INSTALLATION

The PAR-MAX 4 HD can be installed vertically or horizontally, giving installers greater flexibility when working with restricted mounting space.

Installation should still follow the correct Jabsco requirements for the particular mounting location.

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🔥 IGNITION-PROTECTED MOTOR & THERMAL TCO

The heavy-duty motor includes ignition protection and thermal protection / TCO.

Ignition protection is particularly relevant to compatible marine installations, while thermal protection helps safeguard the motor if excessive operating temperature occurs.

These protections do not replace correct cable sizing, circuit protection or installation practices.

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⚡ 12V DC OPERATION

This model is specifically designed for a 12V DC electrical system.

⚠️ IMPORTANT: Do not connect the 12V PAR-MAX 4 HD directly to a 24V electrical supply.

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📋 TECHNICAL SPECIFICATIONS

Brand: Jabsco

Series: PAR-MAX 4 HD

Product Type: Heavy-Duty Automatic Fresh Water Pressure Pump

Voltage: 12V DC

Pump Design: Quad / 4-Chamber Diaphragm

Maximum Flow: 15.2LPM

Pressure Switch Cut-Off: 60 PSI

Automatic Pressure Switch: Yes

Automatic On-Demand Operation: Yes

Suitable Outlets: Up to 4 × 12mm / 1/2"

Self-Priming: Yes

Maximum Self-Priming Lift: 2.4 Metres / 8 Feet

Built-In Bypass: Yes

Pulsation Dampening: Yes

Dry-Run Capability: Short Periods

Mounting Orientation: Vertical or Horizontal

Motor: Heavy-Duty Wider-Diameter Design

Motor Shell: Powder Coated

End Bells: Cast Aluminium

Lower Housing: Cast Aluminium

Motor: Ignition Protected

Thermal Protection: Yes – TCO

Mounting: Vibration-Dampening Base Plate & Feet

Inlet Strainer: 40-Mesh Plug-In Strainer Included

Hose Connections: Quick-Connect Plug-In

Included Fittings: 2 × 12mm / 1/2" Barbed Hose Fittings

Typical Marine Application: Pleasure Craft up to Approximately 13 Metres / 40 Feet

Applications: Caravan, RV, Marine & Multi-Fixture Fresh Water Systems

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🔧 INSTALLATION CONSIDERATIONS

• Use with a suitable 12V DC electrical system
• Ensure all plumbing components are compatible with 60 PSI operation
• Install the supplied 40-mesh inlet strainer
• Keep the suction line airtight for reliable self-priming
• Use suitable fresh-water-rated 12mm hose and fittings
• Keep unnecessary inlet restrictions to a minimum
• Check hot-water service pressure compatibility carefully
• Consider whether pressure regulation is required for lower-rated equipment
• Use correctly sized electrical cable and fuse protection
• Mount securely using the vibration-dampening base and feet

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❓ FREQUENTLY ASKED QUESTIONS

Is this specifically the 60 PSI version?

Yes. This listing is for the Jabsco PAR-MAX 4 HD 12V model with a 60 PSI pressure-switch cut-off.

What is the main difference between the 40 PSI and 60 PSI PAR-MAX 4 HD?

Both are designed around the same high-flow HD4 platform, but this model operates to a higher 60 PSI cut-out pressure. The 60 PSI version is intended for systems that require stronger pressure and whose plumbing components are rated accordingly.

Does the 60 PSI model give more flow than the 40 PSI version?

The specification provided for this model lists up to 15.2LPM. The main difference highlighted between the two versions is pressure capability rather than nominal maximum flow.

When should I choose the 60 PSI version?

Choose the 60 PSI version where stronger system pressure is specifically required and every component in the fresh water system is capable of safely handling it. If your system is designed around lower pressure, the 40 PSI version may be a better match.

Is 60 PSI too high for a caravan?

It can be for some caravan plumbing and appliances. Check the pressure ratings of the hoses, filters, taps, mixers, water heater and fittings before installing this model.

Could I need a pressure regulator?

Yes, potentially. If part of your system has a lower maximum pressure rating than the pump's 60 PSI cut-out, an appropriately designed pressure-control solution may be required.

Is this a good pump for a large caravan with several fixtures?

Yes. The PAR-MAX 4 HD is designed to supply up to four 12mm outlets and offers enough total flow for larger multi-fixture systems.

Can it run four outlets at once?

Jabsco specifies support for up to four outlets. The 15.2LPM total pump flow is shared between whichever fixtures are operating, so performance depends on the demand of each outlet.

Would this run two showers at the same time?

Potentially, especially with water-efficient shower heads. The combined fixture demand needs to remain within the pump's available flow after plumbing restrictions are taken into account.

Will I actually get 15.2LPM from one shower?

Not necessarily. Maximum pump flow is reduced once the pump works against pressure, hose restrictions, filters and the shower head.

How does this compare with the PAR-MAX 3 HD?

The PAR-MAX 3 HD provides up to 11.3LPM and is designed for up to three outlets. The PAR-MAX 4 HD increases maximum flow to 15.2LPM and supports up to four outlets, making it better suited to larger systems and simultaneous demand.

Will the 60 PSI model improve shower pressure?

It provides a higher system pressure capability, which may improve performance where the plumbing and shower equipment can take advantage of it. The final shower result still depends on the shower head, water heater and restrictions.

Can I use it with a caravan hot-water service?

Potentially, but this is one of the most important checks with the 60 PSI model. Confirm the hot-water system's maximum inlet pressure before connection.

Does the pump turn on automatically?

Yes. It uses an integrated pressure switch for fully automatic on-demand operation.

Do I need an accumulator tank?

Not normally. The built-in bypass is designed to reduce pulsation and rapid cycling without requiring a separate accumulator tank.

What does the built-in bypass do?

It helps the pump operate more smoothly when only a small amount of water is required, reducing rapid cycling and water pulsation.

Can I mount the pump above the water tank?

Yes, within its stated 2.4 metre / 8 foot self-priming capability. Keep the inlet plumbing airtight and minimise restrictions.

Can it be installed vertically?

Yes. The pump can be mounted vertically or horizontally.

Can it run dry if the water tank becomes empty?

Yes. The pump can tolerate dry running for short periods without damage. Extended unnecessary dry operation should still be avoided.

Does it include a filter?

Yes. A 40-mesh plug-in inlet strainer is supplied with the pump.

What hose size does it suit?

Two 12mm / 1/2" barbed quick-connect hose fittings are included.

Is this suitable for a 40-foot pleasure craft?

The PAR-MAX 4 HD is described as suitable for freshwater systems on pleasure craft up to approximately 13 metres / 40 feet. Actual suitability still depends on the vessel's water demand and number of fixtures.

Will it work from a 12V lithium battery?

Yes. It can operate from a suitable 12V lithium auxiliary system when correctly wired and fused.

Can I use it with an AGM battery?

Yes. A suitable 12V AGM auxiliary battery system can also operate the pump.

How many amps does the pump draw?

A current rating has not been provided here, so it should not be estimated for electrical system design. Confirm the exact current draw before selecting the cable, fuse and switch.

Would this be a good upgrade from an 11LPM water pump?

Yes if you need more flow for simultaneous outlets or specifically require higher pressure. If the existing 11LPM pump already provides adequate performance, the additional capacity may not be necessary.

Should I choose the 40 PSI or 60 PSI PAR-MAX 4 HD?

Choose based on the pressure requirements and ratings of the complete water system. Both offer high-flow performance, but the 60 PSI model should only be selected where the plumbing, hot-water system and fixtures are designed for that pressure.

What should I check before buying?

Confirm that your electrical system is 12V, verify that your plumbing and appliances can safely handle a 60 PSI cut-out pressure, make sure 15.2LPM suits your water demand, confirm the included 12mm fittings match your plumbing and verify the required current draw, cable size and fuse rating before installation.

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💦 HIGH-FLOW, HIGH-PRESSURE PERFORMANCE FOR DEMANDING 12V WATER SYSTEMS

The Jabsco PAR-MAX 4 HD 12V 60 PSI combines high 15.2LPM water flow with heavy-duty construction and significantly stronger pressure capability.

With support for up to four outlets, a smooth quad four-chamber pump head, built-in pulsation control, 2.4 metre self-priming capability, short-term dry-run protection and included inlet strainer and hose fittings, it is built for demanding caravan, RV and marine fresh water systems.

For installations where both high flow and stronger 60 PSI pressure are required, the PAR-MAX 4 HD delivers a serious step up in fresh water performance.