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: 61470
Water Tank Jacket 50 Gallon
£22.38
ex. VAT £18.65 Each
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20+ available for delivery
Product code: 55265
Joule Invacyl Slimline Indirect Unvented Cylinder 150L
£690.98
ex. VAT £575.82 Each
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For delivery only
Product code: 93935
Joule Invacyl Unvented Direct Cylinder 150L
£513.98
ex. VAT £428.32 Each
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For delivery only
Product code: 81978
Joule Invacyl Slimline Indirect Unvented Cylinder 210L
£704.98
ex. VAT £587.48 Each
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For delivery only
Product code: 41594
Joule Invacyl Slimline Direct Unvented Cylinder 90L
£579.98
ex. VAT £483.32 Each
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For delivery only
Product code: 70204
Expansion Vessel 12L
£33.19
ex. VAT £27.66 Each
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Out of stock for delivery
Product code: 26919
Ariston Andris Expansion Vessel & Non-Return Valve KIT A
£54.78
ex. VAT £45.65 Each
20+ available for delivery
Product code: 64278
Expansion Vessel 18L
£38.71
ex. VAT £32.26 Each
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Out of stock for delivery
Product code: 51742
Joule Invacyl Unvented Indirect Cylinder 210L
£647.98
ex. VAT £539.98 Each
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For delivery only
Product code: 28579
Joule Invacyl Unvented Indirect Cylinder 150L
£606.98
ex. VAT £505.82 Each
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For delivery only
Product code: 49934
Expansion Vessel Control Kit
£56.89
ex. VAT £47.41 Each
2 available for delivery
Product code: 29704
Expansion Vessel 8L
£27.66
ex. VAT £23.05 Each
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Out of stock for delivery
Product code: 38630
Joule Invacyl Unvented Direct Cylinder 300L
£698.98
ex. VAT £582.48 Each
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For delivery only
Product code: 65632
Tesla Long Life Incoloy Immersion Heater & Resettable Thermostat 27"
£29.38
ex. VAT £24.48 Each
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18 available for delivery
Product code: 18313
Joule Invacyl Slimline Direct Unvented Cylinder 210L
£645.98
ex. VAT £538.32 Each
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For delivery only
Product code: 89200
4 Panel Cylinder Jacket 36 x 18"
£19.98
ex. VAT £16.65 Each
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Out of stock for delivery
Product code: 49984
Tesla Long Life Incoloy Immersion Heater & Resettable Thermostat 11"
£26.23
ex. VAT £21.86 Each
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9 available for delivery
Product code: 93426
Joule Invacyl Slimline Indirect Unvented Cylinder 180L
£703.98
ex. VAT £586.65 Each
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For delivery only
Product code: 97382
4 Panel Cylinder Jacket 42 x 18"
£22.98
ex. VAT £19.15 Each
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8 available for delivery
Product code: 38349
Water Storage Tank LWH: 442 x 296 x 305mm 4 Gallon
£10.28
ex. VAT £8.57 Each
5 available for delivery
Product code: 63781
Joule Invacyl Slimline Direct Unvented Cylinder 120L
£591.98
ex. VAT £493.32 Each
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For delivery only
Product code: 17512
Water Tank Jacket 25 Gallon
£13.18
ex. VAT £10.98 Each
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20+ available for delivery