Wiktor Wise
Fitting an electric shower is a complex task that requires plumbing and electrical work. Electric showers provide hot water on demand and can be fitted over a bath or in a shower enclosure. However, it is important to ensure that there is enough room to remove the cover for servicing. Before installing an electric shower, it is crucial to turn off the electrical and water supply. The installation process involves preparing pipework, installing an electricity supply, and connecting the water supply and electrical cables according to the manufacturer's instructions. Due to the risks associated with combining electricity and water, it is generally recommended to enlist the services of a qualified plumber or electrician for the installation or replacement of an electric shower.
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What You'll Learn
Planning and preparation
Before beginning any installation work, ensure that your electrical and water supplies are turned off at the mains. It is crucial to verify that there is no risk of electric shock or water leakage during the installation process. If you are replacing an old electric shower, turn off the existing unit before removing it. Most electric shower units are secured with screws, so have a screwdriver on hand to carefully detach the old shower.
Now, you need to prepare the pipework and electricity supply for the new shower. This involves running a single 15mm pipe from the cold water supply near the storage tank to the wall where the new shower will be installed. Mark the position of the inlet pipe and power supply cable on the wall. It is important to use a pipe and cable detector to check for any hidden pipes or cables before drilling into the wall.
The next step is to fit an isolating valve in the pipe and insert the correct connector for the unit. Drill a hole in the wall for the electric cable, ensuring it is the appropriate size based on the length of the run and the kilowatt rating of the shower unit. The electric cable will run from the shower unit position to a ceiling-mounted double-pole pull-cord switch, which must be installed outside of Zone 1 or 2 as per IEE wiring regulations.
Refer to the manufacturer's instructions for your specific shower model to ensure that you are following the correct procedure for connecting the water supply and electrical cables. If you are unsure or uncomfortable at any point during the installation process, consult a professional.
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Disconnecting the power and water supply
Before beginning any work on installing or replacing an electric shower, you must turn off the electrical supply at the mains. It is also essential to turn off your water supply. This will ensure that there is no risk of electric shock during the installation process.
If you are replacing an old electric shower, you can now proceed to remove the old shower unit. Most electric shower units are secured with screws, so they can usually be removed using a standard screwdriver.
Once the old unit is removed, you will be able to see the water supply connection. At this point, you should consult the manufacturer's instructions for your new shower unit to ensure that you correctly connect the water supply and electrical cables. Each model may have specific requirements, so it is important to refer to the relevant guides.
If you are unsure about any aspect of the installation process, it is always best to consult a professional. Electricians and plumbers can advise on the correct procedures and ensure that your shower is installed safely and correctly.
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Installing pipework and electricity supply
To begin, run a single 15mm pipe from the cold water supply near the storage tank to the wall where the shower will be installed. Hold the shower unit in position and mark where the inlet pipe and power supply cable are. Before drilling into the wall, it is crucial to check for hidden pipes or cables using a pipe and cable detector. Once confirmed safe, drill a hole in the wall for the electric cable. The cable length and shower unit's kilowatt rating will determine the cable size required.
The next step is to run the cable from the shower unit position to a ceiling-mounted double-pole pull-cord switch. This switch must have an on/off indicator and should not be fitted in Zone 1 or 2, adhering to IEE wiring regulations. Now, fit an isolating valve in the pipe and insert the correct connector for the unit.
At this stage, it is recommended to consult the manufacturer's instructions for connecting the water supply and electrical cables. If you are unsure at any point, it is vital to seek advice from a qualified professional.
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Securing the shower unit
Fitting an electric shower is a complex task that requires careful planning and execution. It involves working with electricity and water, which can be extremely dangerous if not done correctly. It is always recommended to consult a qualified plumber or electrician for such installations. However, if you are competent and confident with DIY, here is a detailed guide on securing the electric shower unit:
Firstly, ensure your electrical and water supplies are turned off at the mains before beginning any installation work. If you are replacing an old electric shower unit, start by removing it. Most electric shower units are secured with screws, so you can simply unscrew the cover to access the electrical and water connections inside. Once the old unit is removed, hold the new shower unit in the desired position and mark the locations of the inlet pipe and power supply cable on the wall.
Before drilling into the wall, it is crucial to check for hidden pipes or cables using a pipe and cable detector to avoid any accidental damage. After confirming it is safe, drill a hole in the wall for the electric cable, ensuring it is the appropriate size based on the length of the run and the kilowatt rating of your shower unit. Fit an isolating valve in the water pipe and insert the correct connector for your unit.
Now, you can secure the new shower unit in place. Refer to the manufacturer's instructions for specific details on connecting the water supply and electrical cables. Once the connections are made, replace the cover of the unit, ensuring that the dials align correctly with the spindles, and screw the cover securely in place.
If you are also installing a new shower hose, showerhead, or slide bar, do so now by mounting and connecting these components. Finally, turn the power and water supply back on and test your new electric shower to ensure it is functioning correctly.
Remember, electric showers can be dangerous if not installed correctly. If you are unsure or uncomfortable at any point during the installation process, it is always best to consult a professional.
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Final checks and testing
Secure Connections and Mounting:
Double-check that all electrical connections are secure and tight. Ensure that the electric shower unit is firmly mounted on the wall and that all cables are properly connected, matching colours (green to green, brown to brown, and blue to blue). Make sure to tuck away any excess wire lengths neatly.
Water Supply and Isolation Valve:
Turn on the water supply and carefully check for any leaks. Ensure that the isolation valve is functioning correctly and is easily accessible. This valve is important as it controls the water flow to your shower.
Electrical Connection and Safety:
Before turning on the power, confirm that the electrical supply is switched off at the mains. Then, turn the power back on and run the shower to test its functionality. Monitor the shower for any leaks or electrical faults during this test run.
Temperature Adjustment and Functionality:
Adjust the water temperature to ensure the unit functions as expected. Test both hot and cold water settings to confirm that the temperature adjustments are working correctly.
Consult a Professional:
While DIY installations are possible, it is always recommended to consult a qualified electrician or plumber to review your installation. They can ensure that your electric shower complies with safety regulations and help identify any potential issues.
Silicone Sealant (Optional):
Applying silicone sealant around the edges of the electric shower unit is optional but can help prevent water ingress into the wall. Ensure the silicone is applied neatly and allowed to dry thoroughly before using the shower.
Remember, safety should always be your top priority when dealing with electricity and water. If you have any doubts or concerns during the final checks and testing, don't hesitate to seek professional assistance.
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