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: 26919
Ariston Andris Expansion Vessel & Non-Return Valve KIT A
£43.82 was £54.78
ex. VAT £36.52 Each
Out of stock for delivery
Product code: 49934
Expansion Vessel Control Kit
£53.88
ex. VAT £44.90 Each
Out of stock for delivery
Product code: 70204
Expansion Vessel 12L
£29.98
ex. VAT £24.98 Each
Select from 3 options
Out of stock for delivery
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: 61470
Water Tank Jacket 50 Gallon
£22.38
ex. VAT £18.65 Each
Select from 1 option
Out of stock 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: 12489
Heatrae Sadia Megaflo Eco Direct Cylinder 170L
£1198.98
ex. VAT £999.15 Each
Select from 6 options
For delivery only
Product code: 78838
Heatrae Sadia Megaflo Eco Direct Cylinder 210L
£1276.98
ex. VAT £1064.15 Each
Select from 6 options
For delivery only
Product code: 64278
Expansion Vessel 18L
£34.98
ex. VAT £29.15 Each
Select from 3 options
Out of stock for delivery
Product code: 57767
Joule Invacyl Slimline Direct Unvented Cylinder 150L
£604.98
ex. VAT £504.15 Each
Select from 5 options
For delivery only
Product code: 51742
Joule Invacyl Unvented Indirect Cylinder 210L
£647.98
ex. VAT £539.98 Each
Select from 5 options
For delivery only
Product code: 29704
Expansion Vessel 8L
£24.98
ex. VAT £20.82 Each
Select from 3 options
Out of stock for delivery
Product code: 81659
RM Optimum Stainless Steel Indirect Unvented Hot Water Cylinder 900 x 545 120L
£669.98
ex. VAT £558.32 Each
Select from 5 options
For delivery only
Product code: 49984
Tesla Long Life Incoloy Immersion Heater & Resettable Thermostat 11"
£26.23
ex. VAT £21.86 Each
Select from 1 option
Out of stock for delivery
Product code: 97382
5 Panel Cylinder Jacket 42 x 18"
£22.98
ex. VAT £19.15 Each
Select from 1 option
Out of stock for delivery
Product code: 93935
Joule Invacyl Unvented Direct Cylinder 150L
£513.98
ex. VAT £428.32 Each
Select from 5 options
For delivery only
Product code: 89200
4 Panel Cylinder Jacket 36 x 18"
£19.98
ex. VAT £16.65 Each
Select from 1 option
Out of stock for delivery
Product code: 37570
Byelaw 30 Tank Kit 4 Gallon
£24.98
ex. VAT £20.82 Each
Out of stock for delivery
Product code: 17512
Water Tank Jacket 25 Gallon
£13.18
ex. VAT £10.98 Each
Select from 1 option
Out of stock for delivery
Product code: 96498
Joule Invacyl Unvented Direct Cylinder 180L
£534.98
ex. VAT £445.82 Each
Select from 5 options
For delivery only
Product code: 64909
Joule Invacyl Slimline Direct Unvented Cylinder 180L
£609.98
ex. VAT £508.32 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: 30686
Joule Invacyl Unvented Indirect Cylinder 250L
£699.98
ex. VAT £583.32 Each
Select from 5 options
For delivery only