The Pindex 12V water pump is built around a rated flow of 3GPM (about 11.4 litres a minute) and up to 55 PSI of pressure, aimed at campervan, caravan and motorhome owners who want reliable delivering fresh water to a tap, shower or sink without wiring in a mains supply.
Pindex’s 12V fresh water pump built for delivering fresh water to a tap, shower or sink. At £59.99, it sits in the accessible end of 12V pumps for this use case.
About this fresh water pumps
A noisy, underpowered pump is one of the most common regrets owners mention after their first season on the road, and a pump that quietly does its job without you thinking about it is worth paying attention to before you buy. The Pindex unit is a 12V diaphragm pump aimed squarely at delivering fresh water to a tap, shower or sink, and its spec sheet is built around a rated flow of 3GPM (about 11.4 litres a minute), up to 55 PSI of pressure, a 4-chamber diaphragm design.
In practice, the flow and pressure numbers matter more than they look on paper. A rating of 3GPM (about 11.4 litres a minute) is enough to run a van shower head or a kitchen tap without the pressure dropping off when a second outlet opens. The pressure switch cycles the motor to hold roughly 55 PSI at the outlet, switching off between draws so it isn't running constantly. The 4-chamber design spreads that work across more diaphragms than a basic single-chamber pump, which is the main reason it runs smoother rather than pulsing every time the motor cycles.
It self-primes from cold, pulling water up from the tank without pre-filling the line by hand, and the inlet strainer keeps grit and debris away from the diaphragm. Mount it low, close to the tank and with the strainer accessible, and it should need little beyond an occasional check of the fittings.
At £59.99, it sits at the more accessible end of the 12V pump range for campervan and caravan fitments. The trade-off against a cheaper unit is usually pressure consistency and duty cycle — this is built to run daily rather than occasionally, which is the right call for anyone living in or regularly touring their van rather than using it a few weekends a year.
The details
| Brand | Pindex |
|---|---|
| Flow Rate | 3 GPM (11.4 L/min) |
| Max Pressure | 55 PSI |
| Chambers | 4 |
| Voltage | 12V DC |
| Priming | Self-priming |
| Typical Use | Delivering fresh water to a tap, shower or sink |
Pindex 12V Chamber RV Fresh Water Pressure Pump with Pressure Switch 11.3 L, 3 GPM 55 PSI 3.8 Bar, 4 Chamber Automatic Self Priming Diaphragm Water Pump, for Motorhome Caravan RV Boat Yacht
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Got questions?
A 12V diaphragm pump uses a small DC motor to flex a rubber diaphragm back and forth, drawing water in on one stroke and pushing it out under pressure on the next. A built-in pressure switch senses when line pressure drops (a tap opening) and switches the motor on automatically, then cuts it off once pressure is restored — that's why it self-primes and starts on demand rather than running continuously.
This pump is rated at 3GPM (about 11.4 litres a minute) and up to 55 PSI, enough for a van shower head or kitchen tap without a noticeable drop when a second outlet is open.
Most 12V diaphragm pumps in this flow and pressure range draw somewhere between 3A and 8A while running. Check the rating plate on the pump itself for the exact figure and fuse the circuit above it — never guess and under-fuse a water pump circuit.
The most likely cause is an air lock or a dry tank. Check the tank actually has water in it, then check every fitting on the suction side (between the tank and the pump) for a loose connection or split hose — a pump can run perfectly and still fail to prime if it's drawing in air instead of water. A blocked inlet strainer is the next thing to check.
A pump that clicks on for a second or two even with every tap closed almost always means a small leak somewhere downstream is letting pressure bleed off, re-triggering the pressure switch. If the pump has an accumulator tank, a lost air charge in the tank causes the same symptom — check every joint for weeping before assuming the pump itself has failed.
No. It self-primes, meaning it draws water up from the tank on start-up rather than needing the line filled by hand first.
More diaphragm chambers (this one has 4) spread the pumping action out, so water delivery is smoother and the motor pulses less noticeably at the tap than a basic single-chamber design.
Most diaphragm pumps, including this one, have a check valve built into the pump head that stops water flowing backward when it's switched off, so a separate in-line valve usually isn't needed — confirm against the manual for this exact model if you're plumbing in a long or unusual pipe run.
Running any diaphragm pump dry for an extended period can wear the diaphragm prematurely, so it's worth fitting a low-level cut-out or simply keeping an eye on tank level, particularly if the model doesn't list dry-run protection.
Most 12V diaphragm pumps of this type can be plumbed with an inline accumulator tank to reduce cycling, though it isn't included with this listing.
With normal touring use and occasional descaling in hard-water areas, a quality 12V diaphragm pump typically runs for several years before it needs attention. The diaphragm itself is the part most likely to wear out eventually — most manufacturers, including this one, sell replacement diaphragm and valve kits separately rather than requiring a full pump swap.
GPM (US gallons per minute) and LPM (litres per minute) both measure flow rate. This pump's 3 GPM rating works out to about 11.4 LPM, so you can compare it directly against pumps listed in either unit.
It runs on a standard 12V DC supply from a leisure battery, typically through an inline fuse and a manual or pressure-activated switch — follow the wiring guidance in the box rather than connecting directly to an unfused feed.
It uses standard push-fit or threaded connectors common to caravan and campervan plumbing; check the port size in the specification table against your existing hose or pipe before ordering.
Diaphragm pumps of this type produce an audible motor and valve click during operation; mounting it on rubber isolation feet away from a thin panel wall reduces the vibration passing into the cabin.
Yes, we deliver across the UK. Your exact delivery charge and estimate are calculated at checkout from your address, shown before you pay.
Yes, in line with our returns policy — please keep the original packaging, since a pump is easier to return safely in its original box.
A specific warranty length isn't confirmed in our product record, so we won't state a figure we can't stand behind. Your statutory rights apply regardless, and you're welcome to ask us before ordering.
The complete guide
Mount a water pump low and close to the tank, with the strainer end easy to reach for cleaning, and leave enough slack in the hose either side to absorb vibration rather than transmitting it into a rigid pipe run. A cupboard base near the tank, rather than tucked behind a wall panel, makes both servicing and noise isolation easier later.
The Pindex 12V water pump (ASIN B0FQBYCK6Q) is priced at £59.99. Rated flow: 3 GPM. Max pressure: 55 PSI. 4-chamber diaphragm design. Built for delivering fresh water to a tap, shower or sink in campervans, caravans and motorhomes.