Expansion Tanks & Vessels
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.
Product code: 38349
Water Storage Tank LWH: 442 x 296 x 305mm 4 Gallon
£10.28
ex. VAT £8.57 Each
Out of stock for delivery
Product code: 70204
Expansion Vessel 12L
£33.19
ex. VAT £27.66 Each
Select from 3 options
Out of stock for delivery
Product code: 64278
Expansion Vessel 18L
£38.71
ex. VAT £32.26 Each
Select from 3 options
Out of stock for delivery
Product code: 49934
Expansion Vessel Control Kit
£56.89
ex. VAT £47.41 Each
4 available for delivery
Product code: 26919
Ariston Andris Expansion Vessel & Non-Return Valve KIT A
£50.83 was £54.78
ex. VAT £42.36 Each
17 available for delivery
Product code: 29704
Expansion Vessel 8L
£27.66
ex. VAT £23.05 Each
Select from 3 options
Out of stock for delivery
Product code: 65632
Tesla Long Life Incoloy Immersion Heater & Resettable Thermostat 27"
£29.38
ex. VAT £24.48 Each
Select from 1 option
17 available for delivery
Product code: 49984
Tesla Long Life Incoloy Immersion Heater & Resettable Thermostat 11"
£26.23
ex. VAT £21.86 Each
Select from 1 option
13 available for delivery
Product code: 89200
4 Panel Cylinder Jacket 36 x 18"
£19.98
ex. VAT £16.65 Each
Select from 1 option
20+ available for delivery
Product code: 81978
Joule Invacyl Slimline Indirect Unvented Cylinder 210L
£704.98
ex. VAT £587.48 Each
Select from 4 options
For delivery only
Product code: 63781
Joule Invacyl Slimline Direct Unvented Cylinder 120L
£591.98
ex. VAT £493.32 Each
Select from 5 options
For delivery only
Product code: 85485
T-BAR Expansion Vessel Fixing Bar Kit
£44.98
ex. VAT £37.48 Each
2 available for delivery
Product code: 67812
Heatrae Sadia Megaflo Eco Indirect Cylinder 250L
£1979.52
ex. VAT £1649.60 Each
Select from 6 options
For delivery only
Product code: 13300
Joule Invacyl Unvented Direct Cylinder 120L
£493.98
ex. VAT £411.65 Each
Select from 5 options
For delivery only
Product code: 98639
Heatrae Sadia Megaflo Eco Indirect Cylinder 300L
£2122.14
ex. VAT £1768.45 Each
Select from 6 options
For delivery only
Product code: 18313
Joule Invacyl Slimline Direct Unvented Cylinder 210L
£645.98
ex. VAT £538.32 Each
Select from 5 options
For delivery only
Product code: 79335
Joule Invacyl Unvented Direct Cylinder 210L
£555.98
ex. VAT £463.32 Each
Select from 5 options
For delivery only
Product code: 97382
4 Panel Cylinder Jacket 42 x 18"
£22.98
ex. VAT £19.15 Each
Select from 1 option
Out of stock for delivery
Product code: 21712
Heatrae Sadia Megaflo Eco Direct Cylinder 300L
£1538.34
ex. VAT £1281.95 Each
Select from 6 options
For delivery only
Product code: 41594
Joule Invacyl Slimline Direct Unvented Cylinder 90L
£579.98
ex. VAT £483.32 Each
Select from 5 options
For delivery only
Product code: 17512
Water Tank Jacket 25 Gallon
£13.18
ex. VAT £10.98 Each
Select from 1 option
20+ available for delivery