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 Andris R 10L Under Sink Water Heater 2kW
Save £40
( 34 )

£114.98 was £154.98

ex. VAT £95.82 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

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

£137.98 was £184.98

ex. VAT £114.98 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

Ariston Ariston / Ariston Andris R 15L Under Sink Water Heater 2kW
Save £36
( 31 )

£128.98 was £164.98

ex. VAT £107.48 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

Ariston Ariston / Ariston Andris Expansion Vessel & Non-Return Valve KIT A
20% Off
( 10 )

£54.76 was £68.98

ex. VAT £45.63 Each

Set Store

Out of stock for delivery

Login to save for later

Ariston Ariston / Ariston Andris 3.5 Pressure Reducing Valve KIT B
15% Off
( 2 )

£49.96 was £61.48

ex. VAT £41.63 Each

Set Store

Out of stock for delivery

Login to save for later

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

£151.98 was £164.98

ex. VAT £126.65 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

Triton Showers Triton Showers / Triton T30I Instaflow Handwash 3kW
( 26 )

£89.98

ex. VAT £74.98 Each

Set Store

Out of stock for delivery

Login to save for later

Stiebel Eltron Stiebel Eltron / Stiebel Eltron Electronic Instantaneous Water Heater 9.6kW
( 12 )

£230.98

ex. VAT £192.48 Each

Set Store

Out of stock for delivery

Login to save for later

Zip Water Zip Water / Zip Electric Instantaneous Under Sink Water Heater ES4 - 4.4kW

£312.68

ex. VAT £260.57 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

Ferroli Ferroli / Ferroli Cubo Undersink Water Heater 15L
( 3 )

£120.98

ex. VAT £100.82 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

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

£472.98

ex. VAT £394.15 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

Triton Showers Triton Showers / Triton Instaflow Stored Water Heater 10L 2kW
( 2 )

£159.98

ex. VAT £133.32 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

Stiebel Eltron Stiebel Eltron / Stiebel Eltron DCE-S 6/8 Plus 6-8kW

£373.28

ex. VAT £311.07 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

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

£123.47

ex. VAT £102.89 Each

Set Store

Out of stock for delivery

Login to save for later

Zip Water Zip Water / Zip Aquapoint III Electric Under Sink Water Heater 2kW 15L
( 1 )

£234.98

ex. VAT £195.82 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

Triton Showers Triton Showers / Triton Instaflow Stored Water Heater 5L 1.5kW
( 7 )

£134.98

ex. VAT £112.48 Each

Set Store

Out of stock for delivery

Login to save for later

Redring Redring / Redring Instantaneous Manual Electric Handwash 3kW
( 45 )

£71.17

ex. VAT £59.31 Each

Set Store

Out of stock for delivery

Login to save for later

Zip Water Zip Water / Zip Hydroboil Wall-Mounted Beverage Boiler HS005 2.2kW 5L

£1179.98

ex. VAT £983.32 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

Zip Water Zip Water / Zip CEX-U Electric Instantaneous Under Sink Water Heater 6.6 - 8.8kW
( 1 )

£370.58

ex. VAT £308.82 Each

Set Store

Out of stock for delivery

Login to save for later

Ferroli Ferroli / Ferroli Cubo Undersink Water Heater 10L
( 6 )

£104.98

ex. VAT £87.48 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

Ferroli Ferroli / Ferroli Cubo Oversink Water Heater 15L
( 7 )

£120.98

ex. VAT £100.82 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

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

£90.36

ex. VAT £75.30 Each

Set Store

Out of stock for delivery

Login to save for later

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

£289.58

ex. VAT £241.32 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

Triton Showers Triton Showers / Triton Instaflow Stored Water Heater 15L 2kW
( 6 )

£171.98

ex. VAT £143.32 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later