Thinking about installing a power shower and wondering if it’s something you can handle yourself? This guide covers everything you need to know — from the different types of power showers and what they cost, to the tools you'll need and how to carry out the installation step by step.
Power showers are a great choice for homes with low water pressure, particularly if you have a gravity-fed system. By combining hot and cold water supplies and using a built-in pump, they deliver a stronger, more consistent flow — ideal if your current shower feels more like a drizzle than a downpour.
Whether you're replacing an old unit or fitting a brand-new one, this guide is here to help you get the job done properly and safely.
What Is a Power Shower?
A power shower combines hot and cold water supplies and uses a built-in pump to increase the flow rate, making it ideal for homes with low water pressure.
It works best with gravity-fed systems, which include a cold water storage tank and a hot water cylinder. This setup allows the shower to draw from both supplies and deliver a stronger flow.
Power showers are not suitable for combi boilers or high-pressure systems. They’re different from electric showers, which heat cold water instantly, and from mixer showers, which combine water without boosting pressure. Always check your plumbing setup before choosing a new unit.
Can I Install a Power Shower in My Home?
Before you begin, it's important to check if your home is set up for a power shower. These units are designed for homes with a gravity-fed system — typically a cold water storage tank in the loft and a hot water cylinder elsewhere in the house.
Power showers require access to both the hot and cold water supply and are not suitable for homes with a combi boiler or unvented high-pressure system, as these can’t safely support a pump.
If you’re unsure what type of plumbing you have, speak to a plumber or check with the shower manufacturer. Trying to install the wrong type of unit could lead to poor performance or even damage.
For homes without a gravity system, alternatives like electric showers or mixer showers may be more appropriate, depending on your existing water supply setup.
Further Reading: Tips for Increasing Water Pressure
Types of Power Showers
When choosing a new shower, it’s important to understand the differences between the main types — especially if you're planning to do the installation yourself.
Electric Showers
These heat cold water on demand using an internal heating element. They don’t need a hot water supply, making them ideal for homes with a combi boiler or limited hot water. Electric shower units are usually quicker to fit and require less pipework, but they must be connected to a suitable electricity supply.
Mixer Showers
Mixer showers blend hot and cold water from your existing system without a pump. They’re best for homes with good water pressure or a pumped system already in place. They're usually found in more traditional setups and can be combined with a pump for a power boost, depending on the layout.
Power Showers (Pumped)
These combine hot and cold water like a mixer, but include a built-in pump to boost the flow. They’re designed specifically for gravity fed systems, where the incoming water pressure is low. A power shower unit can make a noticeable difference in performance, especially in older homes.
Do I Need a Qualified Electrician or Plumber?
If you’re confident with DIY and have some experience with basic plumbing, fitting a power shower is something you may be able to take on yourself. However, there are some important safety rules to be aware of — especially when it comes to the electrical connection.
In the UK, any electrical work in a bathroom must comply with Part P of the Building Regulations. This means the final connection of the electricity supply to your electric shower unit should always be carried out or signed off by a qualified electrician.
The shower must also be on its own dedicated circuit and protected by an RCD (residual current device).
For the plumbing side, if you're comfortable working with hot and cold water supplies, cutting into pipework, and using compression fittings, you can likely manage the installation. But if you're unsure at any point, it’s best to bring in a professional to handle specific parts of the job safely.
Cost to Fit a Power Shower (DIY vs. Professional)
The total cost of fitting a new power shower depends on whether you're installing it from scratch or replacing an existing shower unit — and whether you’re doing it yourself or hiring a professional.
DIY Installation
If you already have the right plumbing system in place (typically a gravity-fed system) and feel confident handling both plumbing and preparation, you could save significantly.
A decent power shower unit can range from £100–£300, depending on brand and features. You’ll also need tools and materials like fittings, pipes, and possibly sealants or fixings — adding around £50–£100.
Keep in mind: unless you’re already certified, the final electrical connection must be done by a qualified electrician, which usually costs £100–£200.
Professional Installation
Hiring a plumber and electrician to install a new power shower typically costs £400–£600, depending on complexity and region. Replacing an existing unit with a like-for-like model is usually cheaper — around £250–£350 — as long as the plumbing and electric shower connections don’t need updating.
Extra Costs to Consider:
- Upgrading wiring to meet current IEE Wiring Regulations
- Installing an RCD-protected circuit if not already present
- Wall repair or tiling if cutting into a tiled wall
- Disposing of the old electric shower unit
If you're comfortable with the installation process and only need an electrician for the final step, DIY can offer good savings. But for more complex setups, professional help might be the safer and more cost-effective route.
Preparation Before You Start
Before you install a power shower, take a few key steps to make sure your system is suitable and the work area is ready:
- Check your plumbing: Ensure you have a gravity fed system with a hot water cylinder and cold water storage tank.
- Choose the right unit: Confirm the power shower (or electric shower) is compatible with your setup, and read the manufacturer’s instructions carefully.
- Plan the shower position: Make sure there’s space for the pipe and electric cable, and the shower head or rail can be mounted comfortably.
- Turn off the supplies: Switch off the electricity supply and isolate the cold water supply. Run taps to drain the system.
- Scan the wall: Use an electronic detector to check for hidden pipes or cables before drilling.
- Protect the area: Clear the space and cover surfaces to prevent damage.
- Book a qualified electrician: A professional is required for the final electrical connection and to ensure compliance with building regulations.
Tools & Materials Needed
Now that you’re prepared for the installation, here’s a list of the tools and materials you’ll need to get the job done right:
Step-by-Step Installation Guide
Once you’ve got everything ready, follow these key steps to fit your power shower correctly and safely:
1. Isolate power and water
- Turn off the electricity supply at the consumer unit.
- Shut off the cold water supply at the stopcock.
- Run taps to drain the system.
2. Mark the shower unit position
- Hold the shower unit in place and mark out the outline.
- Use a pencil to mark fixing holes, inlet pipe, and cable entry points.
- Check the height is right for your shower head and rail.
3. Scan the wall
- Use an electronic detector to check for any hidden pipes or electric cables.
- Avoid drilling into anything live or pressurised.
4. Drill and prepare fixings
- Drill pilot holes and insert wall plugs.
- Cut out entry points for the pipe and electric cable.
- Use a reciprocal saw if wall access is tight.
5. Install pipework
- Use a compressed tee fitting to connect to the cold water supply pipe.
- Fit a stop valve near the connection for maintenance.
- Run a 22mm copper pipe to the shower unit location.
- Attach a flexible hose to flush and check for leaks.
6. Connect to shower unit
- Link the inlet pipe to the bottom of the unit using an elbow connector.
- Seal joints with an adjustable wrench.
- Reopen the water supply and check all fittings for leaks.
7. Secure the unit
- Mount the shower unit to the wall using screws and fixings.
- Feed the electric cable through the entry point into the unit.
- Follow the manufacturer's instructions for internal wiring (live, neutral, earth).
8. Install rail and shower head
- Fit the shower rail and holder at a suitable height.
- Attach the shower hose and head.
9. Final electrical connection
- Book a qualified electrician to connect the unit to a dedicated circuit.
- Ensure the connection complies with the IEE Wiring Regulations and is RCD protected.
Testing and Safety Checks
Once the installation is complete, run through these checks before using the shower:
- Turn the water supply back on and inspect all joints for leaks.
- Gradually open the stop valve to allow water into the shower unit.
- Make sure the shower unit is firmly fixed to the wall and there’s no movement.
- Check that the shower head and hose are secure, with no kinks or blockages.
- Ensure the electric cable is properly connected, with no exposed wires.
- Ask your electrician to test the final connection to confirm that RCD protection is in place.
- Verify that the unit powers on correctly and responds to temperature and flow controls.
- Follow the manufacturer's instructions for initial setup and any test procedures.
If anything seems off — unusual noises, flickering power, or water leaks — turn off the system and contact a professional.
Common Mistakes to Avoid
Avoiding these common errors can save you time, money, and stress during your installation:
- Fitting a power shower to a combi boiler or unvented system — these setups are not compatible.
- Choosing the wrong type of unit — double-check whether you need a power shower, electric shower, or mixer shower.
- Skipping the use of a pipe and cable detector before drilling — damaging hidden pipes or cables can be dangerous.
- Mounting the shower unit too close to ceilings or corners — leave space for future servicing or removal.
- Ignoring manufacturer’s instructions — especially wiring diagrams and safety guidelines.
- Not securing electrical connections correctly — this should always be done by a qualified electrician.
- Forgetting to flush the pipework before final connection — debris can damage the unit.
- Over-tightening fittings — can crack plastic parts or distort pipe joints.
Maintenance Tips for Power Showers
A few simple maintenance habits can extend the life of your power shower and keep it performing at its best:
- Clean the shower head – Remove limescale regularly to keep the flow rate strong and even.
- Wipe down the unit – Keep the shower unit and rail free from soap residue and build-up.
- Check for leaks – Inspect all pipe joints and connections every few months.
- Use gentle cleaners – Avoid abrasive or corrosive products, especially on electric shower units.
- Descale when needed – In hard water areas, use a descaler or water softener to prevent internal build-up.
- Switch off when away – Turn off the unit completely if you're not using it for extended periods.
- Service regularly – Book a professional inspection every 1–2 years, especially for electric models.
Frequently Asked Questions
Can I Install An Electric Shower Instead Of A Power Shower?
Yes. If your home doesn’t have a gravity-fed system, an electric shower may be the better option. It connects to the cold water supply only and heats water instantly inside the unit. It's ideal for homes with a combi-boiler or limited hot water storage.
What Type Of Plumbing System Do I Need For A Power Shower?
Power showers are designed for gravity-fed systems, which use a cold water storage tank in the loft and a hot water cylinder elsewhere in the home. This setup allows the shower to draw from both hot and cold water supplies and boost the flow rate with a pump.
Can I Use A Power Shower With A Combi Boiler?
No. Combi boilers provide high-pressure hot water directly from the mains, which is not compatible with power showers. In these cases, a mixer shower or electric shower is more suitable.
Does A Power Shower Need Its Own Dedicated Circuit?
Yes. If the unit has any electrical components such as a built-in pump, it must be connected to its own dedicated circuit, fitted with an RCD (Residual Current Device), and comply with IEE Wiring Regulations. This connection must be made by a qualified electrician.
Is It Safe To Install A Power Shower Myself?
You can carry out most of the plumbing work if you have DIY experience, but any electrical work — especially the final connection — must be completed or signed off by a Part P-certified electrician. This is a legal requirement in the UK.
How Long Does It Take To Install A Power Shower?
A full installation, including new pipework and electrical work, usually takes 6–8 hours. If you're simply replacing an old unit with a similar one, it may only take 2–3 hours.
Can I Install A Shower In A Tiled Wall?
Yes, you can install a shower in a tiled wall, but care is needed. Use the correct drill bits, and always check for hidden pipes and cables using an electronic detector before drilling.
To Conclude
Installing a power shower yourself can be a rewarding DIY project — especially if you're confident with basic plumbing and take the proper safety precautions. With the right tools, preparation, and guidance, you can improve your water pressure and upgrade your bathroom without the full cost of professional labour.
That said, never cut corners when it comes to electrics. Always follow the manufacturer's instructions closely, and make sure a qualified electrician handles or signs off on any electrical work, particularly the final connection.
If you're ever unsure during the process — whether it’s choosing the right type of shower, connecting pipework, or checking compatibility — don’t hesitate to speak with a professional. A quick consultation can save you from costly mistakes later.
Take your time, follow each step carefully, and you’ll be enjoying the benefits of your new power shower in no time.
