Water Heaters

Find the right water heater for your home when you browse our selection at Toolstation, with products available from many trusted brands. Whether you’re looking for an electric water heater, under-sink water heater or over-sink water heater, we’ve got options to suit all budgets and homes.

How Does Water Heating Work?


An electric hot water heater is an instant water heater that can be fitted to any plumbing appliances in your home, from sinks to baths and showers. Unlike gas water heaters, an electric hot water heater doesn’t require additional piping or ventilation, making installation more straightforward.

What Size Water Heater Do I Need?


Every home will require a different size water heater, depending on your hot water usage. As a guide, allow an average of 30-50 litres per person when working out which water heater will best suit you. Installing an electric instant water heater can be a cost-effective and energy-efficient investment for any home.
Ariston Ariston / Ariston Aures Multi Instantaneous Water Heater 9.5kW
10% Off
( 22 )

£98.98 was £109.98

ex. VAT £82.48 Each

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Out of stock for delivery

Triton Showers Triton Showers / Triton T30I Instaflow Handwash 3kW
20% Off
( 33 )

£71.98 was £89.98

ex. VAT £59.98 Each

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Out of stock for delivery

Ariston Ariston / Ariston Andris R 15L Under Sink Water Heater 3kW
Save £47
( 6 )

£137.98 was £184.98

ex. VAT £114.98 Each

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Ariston Ariston / Ariston Andris R 15L Under Sink Water Heater 2kW
Save £36
( 34 )

£128.98 was £164.98

ex. VAT £107.48 Each

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Ariston Ariston / Ariston Andris R 10L Under Sink Water Heater 2kW
Save £40
( 38 )

£114.98 was £154.98

ex. VAT £95.82 Each

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Ferroli Ferroli / Ferroli Cubo Oversink Water Heater 10L
10% Off
( 1 )

£93.91 was £110.48

ex. VAT £78.26 Each

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Ferroli Ferroli / Ferroli Cubo Undersink Water Heater 15L
Save £19
( 4 )

£107.93 was £126.98

ex. VAT £89.94 Each

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Ariston Ariston / Ariston Andris Expansion Vessel & Non-Return Valve KIT A
20% Off
( 11 )

£43.82 was £54.78

ex. VAT £36.52 Each

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Ferroli Ferroli / Ferroli Cubo Oversink Water Heater 15L
Save £19
( 7 )

£107.93 was £126.98

ex. VAT £89.94 Each

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Ariston Ariston / Ariston Andris Discharge Tundish KIT C
20% Off
( 5 )

£12.78 was £15.98

ex. VAT £10.65 Each

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Ferroli Ferroli / Ferroli Cubo Undersink Water Heater 10L
10% Off
( 9 )

£93.91 was £110.48

ex. VAT £78.26 Each

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Ariston Ariston / Ariston Andris R 10L Under Sink Water Heater 3kW
Save £36
( 13 )

£128.98 was £164.98

ex. VAT £107.48 Each

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Ariston Ariston / Ariston Andris 3.5 Pressure Reducing Valve KIT B
20% Off
( 2 )

£39.98 was £49.98

ex. VAT £33.32 Each

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Triton Showers Triton Showers / Triton Instaflow Stored Water Heater 5L 1.5kW
( 8 )

£140.98

ex. VAT £117.48 Each

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Zip Water Zip Water / Zip Electric Instantaneous Under Sink Water Heater ES3 - 2.8kW

£289.58

ex. VAT £241.32 Each

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Zip Water Zip Water / Zip CEX-U Electric Instantaneous Under Sink Water Heater 6.6 - 8.8kW
( 2 )

£370.58

ex. VAT £308.82 Each

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Zip Water Zip Water / Zip Aquapoint III Electric Under Sink Water Heater 2kW 15L
( 2 )

£234.98

ex. VAT £195.82 Each

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Stiebel Eltron Stiebel Eltron / Stiebel Eltron DCE-X 10/12 Premium 10-12kW

£472.98

ex. VAT £394.15 Each

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Zip Water Zip Water / Zip Aquapoint III Electric Under Sink Water Heater 2kW 10L

£219.98

ex. VAT £183.32 Each

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Zip Water Zip Water / Zip Aquapoint III Electric Under Sink Water Heater 2kW 5L
( 2 )

£193.98

ex. VAT £161.65 Each

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Stiebel Eltron Stiebel Eltron / Stiebel Eltron DCE-X 6/8 Premium 6-8kW

£428.38

ex. VAT £356.98 Each

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Stiebel Eltron Stiebel Eltron / Stiebel Eltron DCE-S 10/12 Plus 10-12kW

£406.98

ex. VAT £339.15 Each

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Zip Water Zip Water / Zip Expansion Vessel & Check Valve 247 x 127mm

£90.38

ex. VAT £75.32 Each

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Stiebel Eltron Stiebel Eltron Stiebel Eltron / Stiebel Eltron Vented Point of Use Water Heater 5L 2kW
50% Off
( 25 )

£61.73 was £123.47

ex. VAT £51.44 Each

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Out of stock for delivery