skipToContent

Expansion Tanks & Vessels

At Toolstation, we stock a wide range of feed and expansion tanks from trusted brands like RM Cylinders, Tesla, Polytank and Ariston. Whether you need a 5L expansion tank, 25L hot water storage tank, immersion heater, thermostat, ball valve or tank jacket, we’ve got plenty of products to choose from.

What is a Central Heating Expansion Tank Used For?


Central heating tanks are an essential component for most domestic systems, helping to maintain the correct pressure throughout the system. Expansion vessels work similarly to an overflow tank, allowing excess water or air to be stored as the system heats and cools.

All boilers are already fitted with an expansion tank, but they may need replacing if you frequently experience pressure loss, leaving you without heating or hot water. Browse our full selection of central heating expansion tanks here and find high-quality replacement parts.
( 10 )

£61.58

ex. VAT £51.32 Each

Set Store

Out of stock for delivery

Login to save for later

( 42 )

£317.98

ex. VAT £264.98 Each

Product variations Select from 2 variations
Set Store

Out of stock for delivery

Login to save for later

( 13 )

£367.18

ex. VAT £305.98 Each

Product variations Select from 2 variations
Set Store

Out of stock for delivery

Login to save for later

( 5 )

£320.88

ex. VAT £267.40 Each

Product variations Select from 2 variations
Set Store

Out of stock for delivery

Login to save for later

( 13 )

£335.38

ex. VAT £279.48 Each

Product variations Select from 2 variations
Set Store

Out of stock for delivery

Login to save for later

£781.81

ex. VAT £651.51 Each

Product variations Select from 5 variations

For delivery only

Login to save for later

£758.29

ex. VAT £631.91 Each

Product variations Select from 5 variations

For delivery only

Login to save for later

( 5 )

£339.78

ex. VAT £283.15 Each

Product variations Select from 2 variations
Set Store

Out of stock for delivery

Login to save for later

£692.35

ex. VAT £576.96 Each

Product variations Select from 5 variations

For delivery only

Login to save for later

£873.08

ex. VAT £727.57 Each

Product variations Select from 5 variations

For delivery only

Login to save for later

£768.89

ex. VAT £640.74 Each

Product variations Select from 5 variations

For delivery only

Login to save for later

£837.97

ex. VAT £698.31 Each

Product variations Select from 5 variations

For delivery only

Login to save for later

£678.36

ex. VAT £565.30 Each

Product variations Select from 5 variations

For delivery only

Login to save for later

( 51 )

£10.88

ex. VAT £9.07 Each

Set Store

Out of stock for delivery

Login to save for later

( 77 )

£25.98

ex. VAT £21.65 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

( 62 )

£20.28

ex. VAT £16.90 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

( 60 )

Product code: 61470

Water Tank Jacket 50 Gallon

£19.58

ex. VAT £16.32 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

( 63 )

£16.48

ex. VAT £13.73 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

( 76 )

Product code: 18984

Ball Valve Pack

£14.98

ex. VAT £12.48 Each

Set Store

Out of stock for delivery

Login to save for later

( 56 )

Product code: 64278

Expansion Vessel 18L

£50.18

ex. VAT £41.82 Each

Product variations Select from 3 variations
Set Store

Out of stock for delivery

Login to save for later

( 33 )

£21.98

ex. VAT £18.32 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

( 17 )

Product code: 17512

Water Tank Jacket 25 Gallon

£11.98

ex. VAT £9.98 Each

Product variations Select from 1 variation
Set Store

Out of stock for delivery

Login to save for later

( 56 )

Product code: 70204

Expansion Vessel 12L

£55.88

ex. VAT £46.57 Each

Product variations Select from 3 variations
Set Store

Out of stock for delivery

Login to save for later

( 15 )

Product code: 37570

Byelaw 30 Tank Kit 4 Gallon

£22.78

ex. VAT £18.98 Each

Set Store

Out of stock for delivery

Login to save for later