What is a power shower?
If your shower at home feels more like a trickle than a downpour, you have probably come across the term power shower and wondered whether it is the answer. It often is, but only in the right home. A power shower is a clever, simple idea: take the gentle water pressure of an older home and give it a boost so the shower actually feels like one. This guide explains plainly what a power shower is, how the pump inside it works, what flow rate really means for your morning, who it suits, and the one thing people get confused about, that it has nothing to do with a portable camping shower.
Power shower, defined
A power shower is a plumbed-in bathroom shower that mixes hot and cold water and uses a built-in electric pump to boost the flow. It gives a strong, steady spray in homes with low, gravity-fed water pressure. It is a fixed unit, wired and plumbed into your bathroom, not a portable or camping shower.
Put simply, it does two jobs in one unit. Like a mixer shower, it blends your stored hot and cold water to the temperature you want. Unlike a plain mixer, it then pumps that mixed water out with real force. That pump is the whole point: it is what turns a weak gravity feed into a shower you actually enjoy, and it is also what ties a power shower to one type of plumbing, as the next section explains.
How the pump boosts flow
To see why the pump matters, it helps to know how water reaches your shower. In an older home with a cold-water tank in the loft and a hot-water cylinder in an airing cupboard, water arrives at the shower under the push of gravity alone. The higher the tank sits above the shower, the more pressure you get; if the tank is only a little above the bathroom, the push is gentle and the shower feels weak.
A power shower puts a small electric pump inside the shower unit. When you turn it on, the unit draws the stored hot and cold water, mixes it to your set temperature, and the pump pushes that blended water out through the showerhead far harder than gravity could manage. The result is a forceful, even spray from a system that, left alone, would only dribble. The pump runs on electricity, but it is doing light work, moving water rather than heating it, so it uses far less power than an electric shower.
The pump is built into the same unit as the controls, which is what sets a power shower apart from a separate shower pump fitted elsewhere in the system. You will usually hear it working, a gentle hum, because it is actively pushing the water, and that sound is normal rather than a sign of a fault. Most power showers boost both the hot and the cold feed together, so the temperature you set stays balanced as the flow increases, and on thermostatic models a valve holds that temperature steady even if water is drawn off elsewhere in the house.
What flow rate means
Flow rate is the number that tells you how much water the shower delivers, measured in litres per minute (L/min). It is the difference you actually feel: a higher flow rate means a fuller, more drenching spray, while a low flow rate is the weak shower you are trying to escape. Power showers vary by model, but they deliver a markedly stronger flow than an unpumped gravity mixer in the same home.
Two practical points are worth keeping in mind. First, a higher flow uses more hot water, so a very forceful power shower will empty a hot-water cylinder faster, which matters if several people shower one after another. Second, real-world flow depends on your own plumbing, the height of your tank and the pipework, so treat any headline figure as a guide and check the flow rate on the product page. The honest takeaway: a power shower lifts a weak gravity shower to a genuinely strong one, and the flow-rate figure is how that strength is described.
It is also worth knowing what can quietly hold flow back, because the pump can only do so much. A showerhead furred up with limescale, a kinked hose, or a partly closed valve will throttle even a pumped shower, so in a hard-water area it pays to descale the head now and then. And flow is only half of the experience: temperature stability matters just as much, which is why many people choose a thermostatic power shower that holds the heat steady while it delivers the flow.
Who is a power shower for?
A power shower is for homes with low water pressure caused by a gravity-fed system: a cold-water tank and a hot-water cylinder. That setup is common in older British houses, and it is exactly the situation a power shower is designed to rescue. If your shower is weak and you have a tank in the loft and a cylinder in a cupboard, you are the person power showers were made for.
It is just as important to know who a power shower is not for. If you have a combi boiler, which heats water on demand and has no cylinder, or a high-pressure unvented mains system, you already have pressure, so a power shower is usually not suitable and a pump must not draw from the mains. In that case a thermostatic mixer shower or an electric shower is the right choice. Confirming your system before you buy is the single most useful thing you can do.
The clearest sign you are a good candidate is the combination of a weak shower and stored water: a cold tank in the loft, a hot cylinder in a cupboard, and a shower that has always underwhelmed. Power showers are popular in older terraces, semis and bungalows for exactly this reason, and they are a common upgrade in an ensuite or loft bathroom where the tank sits only just above the showerhead and gravity has little to work with. If that sounds like your home, a power shower is very likely the fix; if you are on a combi, read on for why it is not, and what to choose instead.
Not sure which system you have, or whether a power shower will fix your pressure? See are power showers good for low water pressure? for a quick system check (linking when live).
How it compares with electric and mixer showers
It helps to place a power shower alongside the two other common types, because the names get muddled. An electric shower heats cold mains water on demand, like a kettle, and needs only a cold feed, so it works on almost any system. A mixer shower blends water you have already heated, from a cylinder or boiler, but adds no force of its own. A power shower is really a mixer with a pump added, which is why it boosts flow but needs the stored hot and cold water a gravity-fed system provides. In short, the pump is the dividing line: it gives a power shower its force, and ties it to a gravity-fed system.
| Type | How it works | Boosts flow? |
|---|---|---|
| Electric | Heats cold mains water on demand | No, uses mains pressure |
| Mixer | Blends stored hot and cold water | Only with a separate pump |
| Power | Mixer with a built-in pump | Yes, the pump is built in |
For the full comparison and which suits your home, read power shower vs electric shower
Not a camping kit
Here is the confusion worth clearing up. Search for a power shower online and you will also find portable, battery-powered showers sold for camping, festivals and washing the dog in the garden. Those are a completely different product: a small pump in a bucket or a rechargeable unit, nothing to do with your bathroom plumbing. The power showers in this guide, and the ones we sell, are plumbed-in bathroom fixtures that connect to your hot and cold water and your electrics. If a product talks about being rechargeable, 12-volt or for camping, it is not the kind of power shower covered here.
Power shower FAQs
What is a power shower?
A power shower mixes hot and cold water and uses a built-in electric pump to boost the flow, giving a forceful shower in homes with low, gravity-fed water pressure. It is a plumbed-in bathroom fixture, not a portable camping kit.
How does a power shower work?
It blends your stored hot and cold water to the temperature you set, then an integral pump pushes that mixed water out at a higher flow than gravity alone would give. The pump moves water rather than heating it, so it uses relatively little electricity.
What flow rate does a power shower give?
Models vary, but a power shower delivers a notably more forceful flow, measured in litres per minute, than an unpumped gravity mixer in the same home. Check the flow rate on the product page, as it depends on the model and your plumbing.
Is a power shower the same as an electric shower?
No. An electric shower heats cold mains water itself; a power shower mixes existing hot and cold and pumps it. They need different plumbing and suit different systems. See power shower vs electric shower (linking when live).
Does a power shower need an electrician?
Yes, the pump needs an electrical connection, which a qualified electrician should make to meet bathroom wiring regulations. The load is far lower than an electric shower, with no high-amp circuit or thick cable, but the connection still needs to be done safely.
Are power showers expensive to run?
The pump itself uses little electricity, because it only moves water rather than heating it. The bigger cost is the hot water it uses, which your boiler or immersion heats, and a forceful shower uses more of it. So running cost comes down to how you heat your water and how long you shower, not the pump.
Can I fit a power shower myself?
The plumbing may be within reach of a confident DIYer, but the electrical connection should be made by a qualified electrician to meet bathroom regulations, and many people have the whole job done by a plumber and electrician together. It is not a job to rush, given it combines water and electricity.
Now you know what one is, shop power showers if your home is gravity-fed, or read power shower vs electric shower to be sure of the right type (linking when live). We have helped people sort their showers since 1999, with free UK delivery and 365-day returns. Big brands, small prices.