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: 97382
4 Panel Cylinder Jacket 42 x 18"
£22.98
ex. VAT £19.15 Each
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Out of stock for delivery
Product code: 68350
RM Optimum Stainless Steel Indirect Unvented Hot Water Cylinder 1280 x 545 180L
£648.98
ex. VAT £540.82 Each
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For delivery only
Product code: 85485
T-BAR Expansion Vessel Fixing Bar Kit
£44.98
ex. VAT £37.48 Each
5 available for delivery
Product code: 85192
Joule Invacyl Unvented Indirect Cylinder 180L
£626.98
ex. VAT £522.48 Each
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For delivery only
Product code: 12829
Tesla Copper Immersion Heater & Resettable Thermostat 11"
£21.38
ex. VAT £17.82 Each
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3 available for delivery
Product code: 15936
RM Optimum Stainless Steel Indirect Unvented Hot Water Cylinder 1980 x 545 300L
£814.98
ex. VAT £679.15 Each
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For delivery only
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: 48463
Tesla Expansion Vessel Service Valve
£15.68
ex. VAT £13.07 Each
8 available for delivery
Product code: 77506
Joule Invacyl Unvented Indirect Cylinder 300L
£749.98
ex. VAT £624.98 Each
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For delivery only
Product code: 79335
Joule Invacyl Unvented Direct Cylinder 210L
£555.98
ex. VAT £463.32 Each
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For delivery only
Product code: 96498
Joule Invacyl Unvented Direct Cylinder 180L
£534.98
ex. VAT £445.82 Each
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For delivery only
Product code: 28806
RM Optimum Stainless Steel Direct Unvented Hot Water Cylinder 1720 x 545 250L
£631.98
ex. VAT £526.65 Each
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For delivery only
Product code: 41183
RM Optimum Stainless Steel Indirect Unvented Hot Water Cylinder 1100 x 545 150L
£608.98
ex. VAT £507.48 Each
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For delivery only
Product code: 40149
Tesla Copper Immersion Heater & Resettable Thermostat 27"
£25.66
ex. VAT £21.38 Each
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6 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: 17800
RM Optimum Stainless Steel Direct Unvented Hot Water Cylinder 1470 x 545 210L
£614.98
ex. VAT £512.48 Each
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For delivery only
Product code: 81659
RM Optimum Stainless Steel Indirect Unvented Hot Water Cylinder 900 x 545 120L
£669.98
ex. VAT £558.32 Each
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For delivery only
Product code: 89481
Joule Invacyl Unvented Indirect Cylinder 120L
£581.98
ex. VAT £484.98 Each
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For delivery only
Product code: 63006
RM Optimum Stainless Steel Direct Unvented Hot Water Cylinder 1980 x 545 300L
£692.98
ex. VAT £577.48 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: 41594
Joule Invacyl Slimline Direct Unvented Cylinder 90L
£579.98
ex. VAT £483.32 Each
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For delivery only
Product code: 84070
RM Optimum Stainless Steel Indirect Unvented Hot Water Cylinder 1720 x 545 250L
£805.98
ex. VAT £671.65 Each
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For delivery only
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: 54595
Heatrae Sadia Megaflo Eco Direct Cylinder 70L
£869.43
ex. VAT £724.52 Each
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For delivery only