AquaKing 2 4148 12V Fresh Water Pump | 15LPM 55PSI

💧 SHURFLO AQUAKING 2 12V FRESH WATER PUMP – 15LPM / 55 PSI

High-Flow 4-Chamber Automatic Pressure Pump for Caravans, RVs & Marine Systems – Supports Up to 4 Outlets

💦 The SHURFLO AquaKing 2 Series 4148 is a high-performance 12V automatic fresh water pressure pump designed for larger caravan, RV and marine systems where smooth flow, strong pressure and reliable multi-fixture operation are required.

Delivering up to 15 litres per minute / 4GPM with a 55 PSI shut-off pressure, the AquaKing 2 is capable of supplying up to four outlets such as a shower, galley tap, bathroom basin and additional faucet.

Its four-chamber diaphragm design delivers smooth, quiet water flow, while the built-in mechanical bypass allows the pump to vary its output according to demand. This means it can operate effectively at lower flow rates without repeatedly cycling on and off and without requiring an accumulator tank in a typical installation.

Heavy-duty construction includes an electro-coated corrosion-resistant motor casing, O-ring sealed end bells, sealed wire entries, ignition protection and thermal overload protection, making the AquaKing 2 well suited to demanding mobile and marine water systems.

An inlet strainer and two 12mm / 1/2" straight hose barb fittings are also included for straightforward installation.

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⚡ KEY FEATURES

💦 High-Flow 15LPM / 4GPM Performance
Provides strong water delivery for larger caravan, RV and marine systems with multiple fixtures.

🚿 Supports Up to 4 Outlets
Designed for multi-fixture systems incorporating up to four water outlets such as showers, galley taps and additional faucets.

📈 55 PSI Shut-Off Pressure
Provides strong water pressure for compatible plumbing systems requiring higher-performance water delivery.

🔄 Smooth 4-Chamber Diaphragm
Quad diaphragm construction helps deliver smooth flow and quiet operation across changing water demand.

⚙️ Built-In Mechanical Bypass
Allows the pump to vary flow during lower-demand conditions without rapid cycling.

💨 No Accumulator Tank Normally Required
The internal bypass design allows smooth low-flow operation without requiring a separate accumulator in a typical installation.

💧 Self-Priming to 1.8 Metres
Can draw water from a tank located below the pump within its stated 1.8m / 6ft vertical priming capability.

🔇 Quiet Operation
The four-chamber diaphragm and bypass system help minimise pulsation, cycling and pump noise.

🛡️ Dry-Run Capable
Can operate dry for periods without damage if the fresh water supply is temporarily interrupted.

🔥 Ignition Protected
Designed with ignition protection for compatible marine and mobile installations.

🌡️ Thermal Overload Protection
Built-in motor protection helps safeguard the pump if operating temperature becomes excessive.

🛡️ Sealed Motor Construction
Features O-ring sealed end bells, sealed wire entries and a sealed pressure-switch assembly.

🔧 1/2" NPT Connections
Uses 1/2" male NPT pump ports for flexible plumbing installation.

🧺 Inlet Strainer Included
Helps protect the pump against larger contaminants entering through the water supply.

📜 3 Year Limited Warranty
Backed by a three-year limited warranty.

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🚿 DESIGNED FOR LARGER MULTI-FIXTURE SYSTEMS

The AquaKing 2 4148 is designed for applications where a smaller pump may struggle once several outlets are connected or used at the same time.

A typical four-outlet system could include:

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

Its 15LPM capacity provides greater total flow than common 11LPM-class pumps, making it particularly useful in larger caravans, motorhomes and boats.

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💦 15LPM / 4GPM HIGH-FLOW PERFORMANCE

Maximum Flow: 15 Litres Per Minute

Maximum Flow: 4 Gallons Per Minute

This high-flow capacity makes the AquaKing 2 suitable for showers and larger multi-outlet fresh water systems where maintaining useful flow during simultaneous demand is important.

⚠️ IMPORTANT: The 15LPM figure is the pump's stated maximum flow. Actual water delivery at each fixture will depend on system pressure, hose size, filters, water heaters, fittings and the number of outlets operating simultaneously.

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📈 STRONG 55 PSI WATER PRESSURE

The AquaKing 2 has a stated shut-off pressure of 55 PSI.

This gives the pump strong pressure capability for compatible caravan, RV and marine systems.

⚠️ IMPORTANT: Before installing a 55 PSI pressure pump, confirm that every hose, fitting, tap, mixer, filter, water heater and other plumbing component is rated for the pressure.

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🔄 FOUR-CHAMBER DIAPHRAGM DESIGN

The Series 4148 AquaKing 2 uses a four-chamber diaphragm pump head designed to provide smooth, consistent water delivery.

Advantages include:

• 💦 High-volume water flow
• 💧 Smooth pressure delivery
• 🔇 Quiet operation
• 🔄 Reduced pulsation
• 🚿 Improved multi-fixture performance

The quad design is particularly useful in caravans and boats where vibration and pulsating plumbing can otherwise become noticeable throughout the vehicle or vessel.

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⚙️ MECHANICAL BYPASS – SMOOTH FLOW WITHOUT RAPID CYCLING

One of the major advantages of the AquaKing 2 is its built-in mechanical bypass.

Rather than constantly switching the motor on and off when only a small amount of water is required, the bypass allows the pump to adapt its flow more effectively to lower-demand conditions.

This can provide:

• 💧 Smooth water flow at low demand
• 🔄 Reduced rapid cycling
• 🔇 Less repetitive pump noise
• ⚙️ More stable pressure delivery
• 🚰 Better operation with partially opened taps

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💨 NO ACCUMULATOR TANK REQUIRED

The mechanical bypass allows the AquaKing 2 to operate smoothly across varying demand without requiring a separate accumulator tank in a normal installation.

This can simplify plumbing and save valuable storage space in caravans, RVs and boats.

An accumulator may still be useful in a specialised system, but it is not stated as necessary for normal operation of this pump.

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💧 SELF-PRIMING TO 1.8 METRES

The AquaKing 2 can self-prime to approximately 1.8 metres / 6 feet of vertical lift.

This gives installers flexibility when positioning the pump above the fresh water tank.

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🛡️ DRY-RUN CAPABILITY

The pump can run dry for periods without damage, providing additional protection if:

• 💧 The fresh water tank becomes empty
• 🔧 The pump temporarily loses its water supply
• 🚐 The system is re-priming after the tank is refilled

⚠️ Dry-run capability should be treated as a protection feature. Avoid unnecessary prolonged operation without water.

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🔇 ULTRA-SMOOTH, QUIET WATER DELIVERY

The AquaKing 2 is designed to deliver smooth water flow similar to the feel of a domestic pressure system.

Quiet operation is assisted by:

• 🔄 Four-chamber diaphragm design
• ⚙️ Mechanical bypass control
• 💧 Reduced low-flow cycling
• 🔇 Smooth pressure delivery

Installation quality still makes a significant difference. Mount the pump securely and avoid rigid plumbing immediately beside the pump where possible to reduce transmitted vibration.

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🛠️ HEAVY-DUTY SEALED MOTOR CONSTRUCTION

The Series 4148 AquaKing 2 is designed with a heavy-duty motor for demanding mobile and marine water applications.

Motor construction includes:

• 🛡️ Seamless electro-coated corrosion-resistant motor casing
• ⭕ O-ring sealed end bells
• 🔌 Sealed wire entries
• ⚙️ Sealed pressure-switch unit
• 🔥 Ignition protection
• 🌡️ Thermal overload protection

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🧩 SANTOPRENE DIAPHRAGM & EPDM VALVES

The internal pumping components include:

• 💧 Santoprene diaphragm
• 🔄 EPDM valves
• 🛡️ EPDM seals

These materials form the flexible pumping and sealing components of the AquaKing 2 diaphragm system.

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🔥 IGNITION & THERMAL PROTECTION

The pump incorporates ignition protection for compatible marine installations along with thermal overload protection for the motor.

If excessive motor temperature occurs, thermal protection helps safeguard the pump.

These features do not replace correct circuit protection, wiring, ventilation or installation practices.

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🔩 1/2" NPT PORTS WITH 12MM HOSE FITTINGS

The pump features 1/2" male NPT ports and includes:

• 🔧 2 × Straight 12mm / 1/2" barbed hose fittings
• 🧺 Inlet strainer

This allows straightforward installation with compatible caravan, RV or marine fresh water hose.

The threaded ports can also provide flexibility where alternative compatible fittings are required for a particular installation.

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📜 3 YEAR LIMITED WARRANTY

The SHURFLO AquaKing 2 is backed by a three-year limited warranty, providing additional confidence for customers installing the pump into demanding fresh water systems.

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⚡ 12V DC OPERATION

This AquaKing 2 model is designed for a 12V DC electrical system.

It can be incorporated into compatible caravan, RV, boat and auxiliary battery installations.

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📋 TECHNICAL SPECIFICATIONS

Brand: SHURFLO

Series: AquaKing 2 – 4148

Product Type: Automatic Fresh Water Pressure Pump

Voltage: 12V DC

Pump Design: Quad / 4-Chamber Diaphragm

Maximum Flow: 15LPM / 4GPM

Shut-Off Pressure: 55 PSI

Suitable Outlets: Up to 4

Automatic On-Demand Operation: Yes

Built-In Mechanical Bypass: Yes

Low-Flow Operation Without Rapid Cycling: Yes

Accumulator Tank Required: No for Typical Operation

Self-Priming: Yes

Maximum Self-Priming Lift: 1.8 Metres / 6 Feet

Dry-Run Capability: Yes – For Periods

Diaphragm Material: Santoprene

Valve Material: EPDM

Seal Material: EPDM

Motor: Heavy Duty

Motor Casing: Seamless Electro-Coated Corrosion-Resistant Construction

End Bells: O-Ring Sealed

Wire Entries: Sealed

Pressure Switch: Sealed

Ignition Protection: Yes

Thermal Overload Protection: Yes

Pump Ports: 1/2" Male NPT

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

Inlet Strainer: Included

Warranty: 3 Year Limited Warranty

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

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🔧 INSTALLATION CONSIDERATIONS

• Use with a suitable 12V DC electrical supply
• Mount the pump securely in a protected location
• Install the supplied inlet strainer
• Keep the inlet plumbing airtight for reliable self-priming
• Use suitable fresh-water-rated hose and fittings
• Keep unnecessary inlet restrictions to a minimum
• Ensure all plumbing components can safely handle 55 PSI
• Confirm hot-water system pressure compatibility
• Use correctly sized electrical cable and fuse protection
• Do not assume the sealed motor construction makes the complete pump waterproof

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❓ FREQUENTLY ASKED QUESTIONS

Is this suitable for a large caravan with a kitchen, bathroom and shower?

Yes. The AquaKing 2 4148 is designed for multi-fixture systems with up to four outlets and provides substantially more flow than a small single-tap pump.

Can it genuinely supply four outlets?

Yes, it is specified for up to four fixtures. The total available 15LPM flow is shared between whichever outlets are open, so actual performance depends on the flow requirement of each fixture.

Could I run two showers at the same time?

Potentially, particularly if both use water-efficient shower heads. The combined flow demand needs to remain within the pump's available output after plumbing restrictions are considered.

Will this give better performance than an 11LPM pump?

It provides greater total flow capacity, which can make a noticeable difference when multiple fixtures are being used at the same time. If your system only has one sink and one shower, an 11LPM pump may already be sufficient.

How does this compare with the 11.3LPM SHURFLO AquaKing 2?

The 11.3LPM model is designed for systems with up to three outlets, while this 15LPM Series 4148 model increases maximum flow and is designed for up to four fixtures. Both use four-chamber diaphragm technology and bypass control, but the 15LPM model is the stronger option for larger systems.

How does it compare with the Jabsco PAR-MAX 4 HD?

Both are high-flow four-chamber pumps aimed at larger multi-fixture systems. This AquaKing 2 is rated at 15LPM with a 55 PSI shut-off pressure and supports up to four outlets. The Jabsco PAR-MAX 4 HD models described previously provide up to 15.2LPM and are available in different pressure configurations. The better option depends on desired system pressure, connection style and installation requirements.

Will it provide strong shower pressure?

With up to 15LPM flow and a 55 PSI shut-off pressure, it has substantially more capability than a compact fresh water pump. Actual shower performance still depends on the shower head, hose size, hot-water system and other restrictions.

Will I get the full 15LPM from one shower?

Not necessarily. The 15LPM figure represents maximum pump flow. Actual shower flow will normally be lower once the pump is operating against plumbing pressure and fixture restrictions.

Is 55 PSI too high for caravan plumbing?

It can be for some systems. Check the pressure rating of every hose, fitting, filter, mixer, tap and hot-water appliance before installing the pump.

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

Potentially, provided the hot-water system is rated for the pump's pressure. Check the manufacturer's maximum permitted inlet pressure before installation.

Would I need a pressure regulator?

Possibly. If any part of the plumbing system is rated below the pump's 55 PSI pressure, an appropriately designed pressure-control solution may be required.

Does it automatically start when I open a tap?

Yes. As an automatic demand pump, it starts when water demand reduces system pressure and switches off when the pressure switch reaches its shut-off point.

What is the advantage of the mechanical bypass?

The bypass allows the pump to handle smaller flow demands without rapidly switching on and off. This provides smoother low-flow operation and reduces repetitive pump noise.

Can I partly open a tap without the pump constantly cycling?

Yes. Low-flow operation without rapid cycling is one of the key benefits of the AquaKing 2 mechanical bypass system.

Do I need an accumulator tank?

No accumulator is normally required. The mechanical bypass allows the pump to manage varying water demand smoothly without relying on a separate accumulator tank.

Can I mount the pump above the water tank?

Yes, within its stated self-priming limit of approximately 1.8 metres / 6 feet vertical lift.

Does the 1.8m limit mean I can only use 1.8m of hose?

No. It refers to vertical self-priming lift. Total hose length can be greater, although long or restrictive inlet plumbing can reduce priming and pump performance.

Can it run dry if my water tank becomes empty?

Yes. The AquaKing 2 can run dry for periods without damage, providing useful protection if water supply is temporarily lost.

Is it safe to leave running dry indefinitely?

Dry-run capability is best treated as a safeguard. There is generally no reason to intentionally operate the pump without water for unnecessary periods.

Does it come with an inlet filter?

Yes. An inlet strainer is included with the pump.

What hose fittings are included?

Two straight 12mm / 1/2" barbed hose fittings are included.

Can I use different fittings?

The pump uses 1/2" male NPT ports, so compatible alternative fittings may be used where required. Any fitting used must be suitable for the thread, water application and operating pressure.

Is the pump waterproof?

The motor end bells, wiring entries and pressure-switch assembly are described as sealed, but no specific IP rating has been provided. Install the pump in a protected location rather than assuming the complete unit is waterproof.

Is it suitable for a boat?

Yes. The AquaKing 2 is designed for marine fresh water applications and incorporates corrosion-resistant construction, ignition protection and thermal overload protection.

Can I run it from a 12V lithium battery?

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

Can I run it from an AGM battery?

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

How many amps does it draw?

A specific current draw has not been provided here, so it should not be estimated when selecting wiring or protection. Confirm the electrical specification for the exact SHURFLO 4148 model before choosing cable, fuse and switch ratings.

Does it have a warranty?

Yes. The AquaKing 2 Series 4148 is listed with a three-year limited warranty.

Would this be a good upgrade from my existing 11LPM caravan pump?

It is a strong upgrade if your current pump loses performance when multiple outlets are open, if you've added additional fixtures or if you need greater total water flow. If your existing pump already handles your system comfortably, the extra flow may not be necessary.

What should I check before buying?

Confirm that your system is 12V, check that 15LPM is appropriate for your water demand, ensure all plumbing and appliances can handle 55 PSI, confirm that the supplied 12mm fittings or 1/2" NPT ports suit your plumbing and verify the required current draw, fuse size and cable sizing before installation.

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💦 ULTRA-SMOOTH 15LPM WATER DELIVERY FOR LARGER 12V SYSTEMS

The SHURFLO AquaKing 2 Series 4148 combines high-flow 15LPM performance with a 55 PSI pressure system, smooth four-chamber diaphragm design and intelligent mechanical bypass.

With support for up to four fixtures, 1.8 metre self-priming capability, dry-run protection, ignition protection, thermal overload protection, sealed heavy-duty motor construction and a three-year limited warranty, it is built for serious caravan, RV and marine fresh water applications.

For customers wanting smooth household-style water delivery, strong shower performance and multi-fixture capability without adding an accumulator tank, the AquaKing 2 is a powerful and refined 12V pressure-pump solution.