{"product_id":"shurflo-aquaking-2-4138-12v-fresh-water-pump-11-3lpm-55psi","title":"AquaKing 2 4138 12V Fresh Water Pump | 11.3LPM 55PSI","description":"\u003cdiv style=\"font-weight: bold;\"\u003e\n\u003ch2 style=\"color: #dd1d1d;\"\u003e💧 SHURFLO AQUAKING 2 12V FRESH WATER PUMP – 11.3LPM \/ 55 PSI\u003c\/h2\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eQuiet 4-Chamber Automatic Pressure Pump for Caravans, RVs \u0026amp; Marine Fresh Water Systems\u003c\/h3\u003e\n\u003cp\u003e💦 The SHURFLO AquaKing 2 Series 4138 is a high-performance 12V automatic fresh water pressure pump designed for multi-fixture caravan, RV and marine water systems.\u003c\/p\u003e\n\u003cp\u003eDelivering up to 11.3 litres per minute \/ 3GPM with a 55 PSI shut-off pressure, the AquaKing 2 is designed to comfortably supply systems with up to three outlets such as a shower, galley tap and additional faucet.\u003c\/p\u003e\n\u003cp\u003eIts four-chamber co-moulded diaphragm design provides smooth, quiet water delivery, while the built-in adjustable bypass valve helps prevent rapid pump cycling when only a small amount of water is required.\u003c\/p\u003e\n\u003cp\u003eThe result is smoother flow, reduced noise and a system that can operate without requiring a separate accumulator tank in a typical installation.\u003c\/p\u003e\n\u003cp\u003eWith self-priming capability to 1.8 metres, dry-run protection, ignition protection, thermal overload protection and corrosion-resistant construction, the AquaKing 2 is built for dependable automatic water delivery in demanding mobile and marine environments.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e⚡ KEY FEATURES\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e💦 11.3LPM \/ 3GPM Water Flow\u003c\/span\u003e\u003cbr\u003eProvides strong fresh water delivery for showers, galley taps and multi-outlet caravan or marine systems.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e📈 55 PSI Shut-Off Pressure\u003c\/span\u003e\u003cbr\u003eProvides strong system pressure for compatible fresh water installations.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e🔄 4-Chamber Quad Diaphragm Design\u003c\/span\u003e\u003cbr\u003eFour-chamber construction helps produce smooth flow and low operating noise.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e🚿 Supports Up to 3 Outlets\u003c\/span\u003e\u003cbr\u003eDesigned for multi-fixture installations such as a shower, galley tap and additional faucet.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e⚙️ Adjustable Built-In Bypass Valve\u003c\/span\u003e\u003cbr\u003eHelps control low-flow demand, reduce pulsation and prevent rapid pump cycling.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e💨 No Accumulator Tank Normally Required\u003c\/span\u003e\u003cbr\u003eThe internal bypass system is designed to provide smooth operation without requiring a separate accumulator tank in a typical installation.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e💧 Self-Priming to 1.8 Metres\u003c\/span\u003e\u003cbr\u003eCan draw water from a tank positioned below the pump within its stated 1.8m \/ 6ft vertical priming capability.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e🔇 Very Quiet Operation\u003c\/span\u003e\u003cbr\u003eThe quad diaphragm design and bypass system help reduce pump noise and repetitive cycling.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e🛡️ Dry-Run Capable\u003c\/span\u003e\u003cbr\u003eCan run dry for periods without damage if the fresh water supply is temporarily interrupted.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e🔥 Ignition Protected\u003c\/span\u003e\u003cbr\u003eDesigned with ignition protection for compatible marine and mobile installations.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e🌡️ Thermal Overload Protection\u003c\/span\u003e\u003cbr\u003eBuilt-in motor protection helps safeguard the pump if operating temperature becomes excessive.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e🔩 1\/2\" NPT Male Ports\u003c\/span\u003e\u003cbr\u003eUses standard 1\/2\" male NPT threaded pump ports for versatile plumbing integration.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #80ff00;\"\u003e🔧 12mm Hose Fittings Included\u003c\/span\u003e\u003cbr\u003eSupplied with two straight 12mm \/ 1\/2\" barbed hose fittings.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e🚐 DESIGNED FOR COMPLETE CARAVAN \u0026amp; RV WATER SYSTEMS\u003c\/h3\u003e\n\u003cp\u003eThe AquaKing 2 is designed for systems that need more than a basic single-tap water pump.\u003c\/p\u003e\n\u003cp\u003eIts 11.3LPM flow rate and 55 PSI pressure capability make it suitable for applications such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e🚰 Caravan kitchen \/ galley taps\u003c\/li\u003e\n\u003cli\u003e🚿 Internal showers\u003c\/li\u003e\n\u003cli\u003e🚰 Bathroom basins\u003c\/li\u003e\n\u003cli\u003e🚿 External showers\u003c\/li\u003e\n\u003cli\u003e🚐 RV fresh water systems\u003c\/li\u003e\n\u003cli\u003e🏕️ Camper installations\u003c\/li\u003e\n\u003cli\u003e🚤 Marine fresh water systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSHURFLO specifies the pump for multi-fixture installations with up to three outlets.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e💦 11.3LPM \/ 3GPM FLOW\u003c\/h3\u003e\n\u003cp\u003eMaximum Flow: 11.3 Litres Per Minute\u003c\/p\u003e\n\u003cp\u003eMaximum Flow: 3 Gallons Per Minute\u003c\/p\u003e\n\u003cp\u003eThis provides substantially greater capacity than small 3–4LPM sink pumps and makes the AquaKing 2 much better suited to shower and multi-outlet applications.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e📈 55 PSI SHUT-OFF PRESSURE\u003c\/h3\u003e\n\u003cp\u003eThe AquaKing 2 has a stated shut-off pressure of 55 PSI.\u003c\/p\u003e\n\u003cp\u003eThis allows the pump to provide strong pressure for compatible caravan, RV and marine fresh water systems.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #dd1d1d;\"\u003e⚠️ IMPORTANT: Before installing a 55 PSI pump, confirm that all hoses, taps, mixers, filters, water heaters and fittings in the system are rated for the pump's pressure.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e🔄 SMOOTH 4-CHAMBER DIAPHRAGM DESIGN\u003c\/h3\u003e\n\u003cp\u003eThe AquaKing 2 uses a four-chamber co-moulded diaphragm to produce smooth and consistent water delivery.\u003c\/p\u003e\n\u003cp\u003eThe quad design provides several advantages in a mobile water system:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e💧 Smooth water delivery\u003c\/li\u003e\n\u003cli\u003e🔇 Reduced operating noise\u003c\/li\u003e\n\u003cli\u003e⚙️ Stable pressure performance\u003c\/li\u003e\n\u003cli\u003e🚿 Better multi-fixture operation\u003c\/li\u003e\n\u003cli\u003e🔄 Reduced pulsation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt is particularly useful in caravans and boats where pump vibration and cycling can easily be transmitted through cabinetry and floors.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e⚙️ ADJUSTABLE BUILT-IN BYPASS VALVE\u003c\/h3\u003e\n\u003cp\u003eThe AquaKing 2 incorporates an adjustable internal bypass valve designed to provide smoother operation at low water demand.\u003c\/p\u003e\n\u003cp\u003eWhen a tap is only partially open, a conventional pressure pump can repeatedly start and stop as pressure rapidly rises and falls.\u003c\/p\u003e\n\u003cp\u003eThe bypass helps control this behaviour and can provide:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e🔄 Reduced rapid cycling\u003c\/li\u003e\n\u003cli\u003e💧 Smoother low-flow water delivery\u003c\/li\u003e\n\u003cli\u003e🔇 Less repetitive pump noise\u003c\/li\u003e\n\u003cli\u003e⚙️ More stable system operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e💨 NO ACCUMULATOR TANK REQUIRED\u003c\/h3\u003e\n\u003cp\u003eThanks to its internal bypass design, the AquaKing 2 can provide smooth flow without requiring a separate accumulator tank in a typical installation.\u003c\/p\u003e\n\u003cp\u003eThis can save space and simplify plumbing inside caravans, RVs and boats.\u003c\/p\u003e\n\u003cp\u003eAn accumulator may still be useful in specialised system designs, but it is not stated as necessary for normal pump operation.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e🚿 SUITABLE FOR UP TO THREE OUTLETS\u003c\/h3\u003e\n\u003cp\u003eThe AquaKing 2 is designed for multi-fixture systems containing up to three water outlets.\u003c\/p\u003e\n\u003cp\u003eA typical arrangement could include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e🚰 1 × Galley tap\u003c\/li\u003e\n\u003cli\u003e🚿 1 × Shower\u003c\/li\u003e\n\u003cli\u003e🚰 1 × Bathroom or additional faucet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf several outlets are opened simultaneously, the pump's available 11.3LPM flow is shared between them.\u003c\/p\u003e\n\u003cp\u003eThe number of connected outlets should therefore not be confused with the number that can necessarily operate at full flow at the same time.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e💧 SELF-PRIMING TO 1.8 METRES\u003c\/h3\u003e\n\u003cp\u003eThe AquaKing 2 can self-prime to approximately 1.8 metres \/ 6 feet of vertical lift.\u003c\/p\u003e\n\u003cp\u003eThis allows greater flexibility in pump placement because the pump does not need to be mounted below the fresh water tank.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e🛡️ DRY-RUN CAPABILITY\u003c\/h3\u003e\n\u003cp\u003eThe pump can operate dry for periods without damage, providing useful protection if the fresh water tank becomes empty or the inlet temporarily loses water.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #dd1d1d;\"\u003e⚠️ Dry-run capability is best treated as a protection feature. There is generally no benefit in intentionally operating the pump without water for unnecessary periods.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e🔇 VERY QUIET OPERATION\u003c\/h3\u003e\n\u003cp\u003eThe AquaKing 2 is designed specifically to provide low-noise operation.\u003c\/p\u003e\n\u003cp\u003eIts quiet performance is supported by:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e🔄 Four-chamber diaphragm design\u003c\/li\u003e\n\u003cli\u003e⚙️ Internal bypass control\u003c\/li\u003e\n\u003cli\u003e💧 Reduced rapid cycling\u003c\/li\u003e\n\u003cli\u003e🔇 Smooth low-flow operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInstallation quality still plays an important role. Mounting the pump securely and avoiding rigid plumbing immediately against the pump can further reduce transmitted noise.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e🛡️ CORROSION-RESISTANT MOTOR CONSTRUCTION\u003c\/h3\u003e\n\u003cp\u003eThe AquaKing 2 uses a seamless electro-coated motor casing designed to resist corrosion in demanding mobile and marine environments.\u003c\/p\u003e\n\u003cp\u003eThe motor casing and pressure-switch assembly are also sealed to provide additional protection for the pump components.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e🔥 IGNITION \u0026amp; THERMAL PROTECTION\u003c\/h3\u003e\n\u003cp\u003eThe AquaKing 2 incorporates both ignition protection and thermal overload protection.\u003c\/p\u003e\n\u003cp\u003eIgnition protection is particularly relevant to compatible marine installations, while thermal overload protection helps protect the motor if excessive temperature occurs.\u003c\/p\u003e\n\u003cp\u003eThese protections add durability but do not replace correct wiring, fusing, ventilation and installation practices.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e🧩 SANTOPRENE DIAPHRAGM \u0026amp; EPDM VALVES\u003c\/h3\u003e\n\u003cp\u003eThe pump uses:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e💧 Santoprene diaphragm\u003c\/li\u003e\n\u003cli\u003e🔄 EPDM valves\u003c\/li\u003e\n\u003cli\u003e🛡️ EPDM seals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese components form the internal pumping and sealing system of the AquaKing 2.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e🔩 1\/2\" NPT PORTS WITH 12MM HOSE FITTINGS\u003c\/h3\u003e\n\u003cp\u003eThe pump uses 1\/2\" male NPT connection ports.\u003c\/p\u003e\n\u003cp\u003eTwo straight 12mm \/ 1\/2\" barbed hose fittings are supplied, allowing straightforward integration into compatible caravan, RV or marine water hose systems.\u003c\/p\u003e\n\u003cp\u003eThis arrangement also gives installers flexibility if an alternative compatible 1\/2\" NPT fitting is required for a particular plumbing layout.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e⚡ 12V DC OPERATION\u003c\/h3\u003e\n\u003cp\u003eThe SHURFLO AquaKing 2 is designed for a 12V DC electrical system.\u003c\/p\u003e\n\u003cp\u003eThis makes it suitable for compatible caravan, RV, boat and auxiliary-battery installations.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e📋 TECHNICAL SPECIFICATIONS\u003c\/h3\u003e\n\u003cp\u003eBrand: SHURFLO\u003c\/p\u003e\n\u003cp\u003eSeries: 4138 AquaKing 2\u003c\/p\u003e\n\u003cp\u003eProduct Type: Automatic Fresh Water Pressure Pump\u003c\/p\u003e\n\u003cp\u003eVoltage: 12V DC\u003c\/p\u003e\n\u003cp\u003ePump Design: Quad \/ 4-Chamber Diaphragm\u003c\/p\u003e\n\u003cp\u003eMaximum Flow: 11.3LPM \/ 3GPM\u003c\/p\u003e\n\u003cp\u003eShut-Off Pressure: 55 PSI\u003c\/p\u003e\n\u003cp\u003eSuitable Outlets: Up to 3\u003c\/p\u003e\n\u003cp\u003eAutomatic On-Demand Operation: Yes\u003c\/p\u003e\n\u003cp\u003eBuilt-In Bypass: Yes – Adjustable\u003c\/p\u003e\n\u003cp\u003eAccumulator Tank Required: No for Typical Operation\u003c\/p\u003e\n\u003cp\u003eSelf-Priming: Yes\u003c\/p\u003e\n\u003cp\u003eMaximum Self-Priming Height: 1.8 Metres \/ 6 Feet\u003c\/p\u003e\n\u003cp\u003eDry-Run Capability: Yes – For Periods\u003c\/p\u003e\n\u003cp\u003eDiaphragm Material: Santoprene\u003c\/p\u003e\n\u003cp\u003eValve Material: EPDM\u003c\/p\u003e\n\u003cp\u003eSeal Material: EPDM\u003c\/p\u003e\n\u003cp\u003eMotor Casing: Seamless Electro-Coated Corrosion-Resistant Construction\u003c\/p\u003e\n\u003cp\u003ePressure Switch: Sealed\u003c\/p\u003e\n\u003cp\u003eMotor Casing: Sealed\u003c\/p\u003e\n\u003cp\u003eIgnition Protection: Yes\u003c\/p\u003e\n\u003cp\u003eThermal Overload Protection: Yes\u003c\/p\u003e\n\u003cp\u003ePump Ports: 1\/2\" Male NPT\u003c\/p\u003e\n\u003cp\u003eIncluded Fittings: 2 × Straight 12mm \/ 1\/2\" Barbed Hose Fittings\u003c\/p\u003e\n\u003cp\u003eApplications: Caravan, RV, Marine \u0026amp; Multi-Fixture Fresh Water Systems\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003e🔧 INSTALLATION CONSIDERATIONS\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse with a suitable 12V DC electrical supply\u003c\/li\u003e\n\u003cli\u003eMount the pump securely in a protected location\u003c\/li\u003e\n\u003cli\u003eKeep the inlet line airtight for reliable self-priming\u003c\/li\u003e\n\u003cli\u003eUse suitable fresh-water-rated hose and fittings\u003c\/li\u003e\n\u003cli\u003eUse the supplied 12mm hose fittings where appropriate\u003c\/li\u003e\n\u003cli\u003eKeep inlet plumbing as unrestricted as practical\u003c\/li\u003e\n\u003cli\u003eEnsure all plumbing components are rated for at least the pump's 55 PSI shut-off pressure\u003c\/li\u003e\n\u003cli\u003eConfirm hot-water system compatibility before installation\u003c\/li\u003e\n\u003cli\u003eUse correctly sized electrical cable and fuse protection\u003c\/li\u003e\n\u003cli\u003eDo not adjust the internal bypass without following the appropriate SHURFLO procedure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2 style=\"color: #dd1d1d;\"\u003e❓ FREQUENTLY ASKED QUESTIONS\u003c\/h2\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eIs this a good pump for a caravan with a shower and kitchen sink?\u003c\/h3\u003e\n\u003cp\u003eYes. The AquaKing 2 is specifically designed for multi-fixture applications and can support up to three outlets, making a shower and galley tap a strong application.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eCan I run three water outlets from one pump?\u003c\/h3\u003e\n\u003cp\u003eYes. The pump is specified for up to three outlets. When several outlets are open simultaneously, the available flow will be shared between them.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eWill it give me good caravan shower pressure?\u003c\/h3\u003e\n\u003cp\u003eWith up to 11.3LPM flow and a 55 PSI shut-off pressure, it has significantly greater capability than a compact single-outlet water pump. Actual shower performance will depend on the shower head, plumbing, filters and hot-water system.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eWill I get the full 11.3LPM at my shower?\u003c\/h3\u003e\n\u003cp\u003eNot necessarily. The maximum flow rating is measured under lower system resistance. Actual flow decreases as the pump operates against pressure and plumbing restrictions.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eHow does the AquaKing 2 compare with the Jabsco PAR-MAX 3?\u003c\/h3\u003e\n\u003cp\u003eBoth are designed for multi-outlet systems and offer approximately 11.3LPM maximum flow. The AquaKing 2 uses a four-chamber design and has a 55 PSI shut-off pressure, while the standard PAR-MAX 3 information provided lists a three-chamber design with a 40 PSI cut-out. The best choice depends on the pressure rating of your plumbing and the type of water delivery you want.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eHow does it compare with the Jabsco PAR-MAX 3 HD?\u003c\/h3\u003e\n\u003cp\u003eBoth use four-chamber pump designs and target higher-pressure applications. The AquaKing 2 is listed at 55 PSI shut-off, while the PAR-MAX 3 HD is listed at 60 PSI. Both provide up to 11.3LPM. Check connection type, pressure requirements and installation details when choosing between them.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eIs 55 PSI too much for my caravan plumbing?\u003c\/h3\u003e\n\u003cp\u003eIt may be for some systems. Before fitting the AquaKing 2, confirm the maximum pressure rating of the hoses, taps, mixers, filters, fittings and hot-water appliances already installed.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eCan I use it with a caravan hot-water service?\u003c\/h3\u003e\n\u003cp\u003ePotentially, but the hot-water system must be compatible with the pump's pressure. Check the manufacturer's maximum inlet pressure before installing a 55 PSI pump.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eWould I need a pressure reducer?\u003c\/h3\u003e\n\u003cp\u003ePossibly. If any component in the system is rated below the pump's pressure, a correctly selected pressure-control solution may be required. This depends on the complete plumbing design rather than the pump alone.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eDoes the pump automatically start when I open a tap?\u003c\/h3\u003e\n\u003cp\u003eYes. It is an automatic pressure pump designed to operate according to water demand and stop once system pressure reaches its shut-off point.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eDo I need an accumulator tank?\u003c\/h3\u003e\n\u003cp\u003eNo accumulator is required for normal operation according to the supplied information. The adjustable internal bypass is designed to reduce pulsation and rapid cycling.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eWhat does the adjustable bypass do?\u003c\/h3\u003e\n\u003cp\u003eIt allows the pump to handle lower water-flow demand more smoothly rather than repeatedly switching on and off. This can improve low-flow performance and reduce pump noise.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eShould I adjust the bypass myself?\u003c\/h3\u003e\n\u003cp\u003eOnly if adjustment is required and you have the correct SHURFLO setup procedure. Altering the bypass setting without understanding the system can affect pump cycling and pressure behaviour.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eCan I mount the pump above the fresh water tank?\u003c\/h3\u003e\n\u003cp\u003eYes, within its stated self-priming capability. It can self-prime up to approximately 1.8 metres \/ 6 feet vertically.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eDoes the 1.8 metre rating mean I can only use 1.8 metres of hose?\u003c\/h3\u003e\n\u003cp\u003eNo. It refers to vertical self-priming lift rather than total hose length. Longer runs may be possible, but additional hose and fittings create restriction and can affect performance.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eCan it run dry if my tank runs empty?\u003c\/h3\u003e\n\u003cp\u003eYes. The pump is stated as being capable of running dry for periods without damage, providing useful protection if the water supply is lost.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eCan I leave it running dry continuously?\u003c\/h3\u003e\n\u003cp\u003eAlthough it has dry-run capability, unnecessary operation without water should still be avoided. Dry-run ability is best treated as protection against temporary loss of supply.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eIs this pump noisy?\u003c\/h3\u003e\n\u003cp\u003eThe AquaKing 2 is specifically designed for very quiet operation. Its four-chamber diaphragm and adjustable bypass help reduce pulsation and rapid cycling, although the mounting surface and plumbing layout can still affect real-world noise.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eWhat hose size does it suit?\u003c\/h3\u003e\n\u003cp\u003eThe pump has 1\/2\" male NPT ports and includes two straight 12mm \/ 1\/2\" barbed fittings for compatible hose.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eCan I change the supplied hose fittings?\u003c\/h3\u003e\n\u003cp\u003eThe 1\/2\" NPT pump ports provide flexibility for using alternative compatible fittings if your plumbing layout requires them. Any replacement fittings must be suitable for the thread, pressure and water application.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eCan I run this from a lithium battery?\u003c\/h3\u003e\n\u003cp\u003eYes. The pump is designed for 12V DC operation and can be used with a suitable 12V lithium auxiliary electrical system when correctly wired and fused.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eCan I run it from an AGM battery?\u003c\/h3\u003e\n\u003cp\u003eYes. A suitable 12V AGM battery can also power the pump.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eHow many amps does it use?\u003c\/h3\u003e\n\u003cp\u003eA current rating has not been provided here, so it should not be guessed for electrical system design. Confirm the current specification for the exact SHURFLO 4138 model before selecting fuse, cable and switch ratings.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eIs it suitable for marine use?\u003c\/h3\u003e\n\u003cp\u003eYes. The AquaKing 2 is designed for marine fresh water applications and includes ignition protection and corrosion-resistant motor construction.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eIs the pump waterproof?\u003c\/h3\u003e\n\u003cp\u003eThe motor and pressure-switch assemblies are described as sealed, but no specific IP rating has been provided. Install the pump in an appropriately protected location rather than assuming it is suitable for unrestricted exposure to water.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eWould this be a good replacement for an older caravan water pump?\u003c\/h3\u003e\n\u003cp\u003ePotentially. Compare the old pump's voltage, flow, pressure, port arrangement, mounting space and electrical requirements. The most important check when upgrading is whether the existing plumbing and appliances can safely handle the AquaKing 2's 55 PSI shut-off pressure.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eWhen should I choose this instead of a smaller 3.8LPM pump?\u003c\/h3\u003e\n\u003cp\u003eChoose the AquaKing 2 if you have a shower, several outlets or want substantially greater water flow. A 3.8LPM pump is more appropriate for a simple single-tap setup where high flow is unnecessary.\u003c\/p\u003e\n\u003ch3 style=\"color: #00aaff;\"\u003eWhat should I check before buying?\u003c\/h3\u003e\n\u003cp\u003eConfirm that your system is 12V, make sure 11.3LPM is appropriate for your water usage, check that all plumbing components can handle the 55 PSI shut-off pressure, confirm that the supplied 12mm hose fittings suit your plumbing and verify the current draw, cable size and fuse requirement for the exact pump before installation.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2 style=\"color: #dd1d1d;\"\u003e💧 SMOOTH, QUIET \u0026amp; POWERFUL WATER DELIVERY FOR YOUR 12V SYSTEM\u003c\/h2\u003e\n\u003cp\u003eThe SHURFLO AquaKing 2 combines strong 11.3LPM flow and 55 PSI pressure capability with a quiet four-chamber diaphragm design and adjustable internal bypass.\u003c\/p\u003e\n\u003cp\u003eWith support for up to three outlets, 1.8 metre self-priming capability, dry-run protection, thermal overload protection, ignition protection and included 12mm hose fittings, it is well equipped for complete caravan, RV and marine fresh water systems.\u003c\/p\u003e\n\u003cp\u003eFor customers wanting strong shower performance, smooth low-flow operation and reduced pump cycling without adding an accumulator tank, the AquaKing 2 is a highly capable 12V pressure-pump option.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"SHURFLO","offers":[{"title":"Default Title","offer_id":45112648237304,"sku":"RWB5904","price":378.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/9230\/4632\/files\/rwb5904_0_30126190-15d4-424f-a46c-83a3d872aaba.jpg?v=1788492416","url":"https:\/\/www.homeof12volt.com.au\/products\/shurflo-aquaking-2-4138-12v-fresh-water-pump-11-3lpm-55psi","provider":"Home of 12 Volt Northern","version":"1.0","type":"link"}