Electric shower installation in London
An electric shower heats the water itself as it flows through, using cold water straight off the mains and its own built-in heating element — it has nothing to do with a shower pump, which only boosts the pressure of water that is already hot. That is exactly why it suits a flat with weak water pressure: there is no hot supply and no boost required at all. Ninja Plumbers fits new units, replaces old ones, and always checks the electrics can genuinely carry the load before anything goes near the wall.
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What's included
- New electric shower installation, most makes
- Replacing an existing unit, same spec or a higher kW
- Cold water isolation valve fitted where there is none
- Checking existing cable and breaker against the new unit’s load
- Siting and pipework for a shower where there was none before
- Adding or upgrading the dedicated circuit where one is needed
Worth knowing first
A bit of this might save you from needing a callout at all — we'd rather you knew it upfront.
It is not the same thing as a shower pump
An electric shower heats mains water itself and needs no hot supply or pump — that is exactly why it works in a flat with poor pressure where a pumped shower cannot. If yours needs boosting rather than heating, that is the Shower Pumps page, not this one.
A higher kW rating needs the cable checked, not just the shower
Moving up from something like an 8.5kW unit to a 10.5kW or above pulls significantly more current, and the cable and breaker already in place might not be rated to handle it. Ninja Plumbers checks that before you spend money on the higher-power unit, not after it has already gone up on the wall.
The circuit and the shower, from one team
A dedicated fused circuit back to the consumer unit is notifiable electrical work. Where one already exists and is adequate for the new unit, we connect straight to it. Where it does not, our electricians install or upgrade the circuit first, and that is included in the price before anything starts, so you are not coordinating a separate trade.
Mains pressure and flow decide what is realistic
A higher kW unit needs a decent cold flow rate to deliver it. On a poor mains supply, fitting the biggest unit available can leave you with lukewarm water at full flow rather than hot water — worth checking before choosing the spec.
Common questions
Can you fit a shower with a higher kW rating than the old one?
Often, once the existing cable and breaker are checked against the new load. If they are not adequate, the circuit has to be upgraded first, which our electricians can do as part of the same job. We will tell you before quoting, not after.
Do I need an electrician as well as a plumber?
Only if there is no adequate dedicated circuit already there. If there is, we connect to it directly. If there is not, our electricians can install one, and it is included in the price before any work starts.
Can you supply the shower as well as fit it?
We can supply one, or simply fit a unit you have already bought — both routes work fine, and buying the shower yourself tends to end up cheaper than one supplied through a trade markup.
Can you fit one where there has never been a shower before?
Yes, provided the wall can take the fixings and a route exists for the pipework and cable. We will look and tell you what is involved rather than quote blind.
Part of our bathrooms & pumps work
If it turns out to be a repair job rather than a new install, this is where that's covered.
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Bathroom Installation
A single fixture swap through to a full strip-out and refit, priced up front.
More on Bathroom Installation -
General Plumbing
Taps, toilets, radiators and pipework. The jobs that never quite get done.
More on General Plumbing
Other appliance work
Need electric shower installation in London?
Let us know what’s going on and whereabouts you are, and we’ll give you a price before any work starts.