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: 79335
Joule Invacyl Unvented Direct Cylinder 210L
£555.98
ex. VAT £463.32 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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Out of stock for delivery
Product code: 30686
Joule Invacyl Unvented Indirect Cylinder 250L
£699.98
ex. VAT £583.32 Each
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For delivery only
Product code: 64909
Joule Invacyl Slimline Direct Unvented Cylinder 180L
£609.98
ex. VAT £508.32 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
Out of stock for delivery
Product code: 40149
Tesla Copper Immersion Heater & Resettable Thermostat 27"
£25.66
ex. VAT £21.38 Each
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Out of stock for delivery
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: 62376
Indirect Hot Water Cylinder 900 x 450 117L
£219.97 was £274.97
ex. VAT £183.31 Each
Out of stock for delivery
Product code: 48463
Tesla Expansion Vessel Service Valve
£15.68
ex. VAT £13.07 Each
Out of stock 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: 47335
Storage Tank Lid 25 Gallon
£5.00 was £19.57
ex. VAT £4.17 Each
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: 74096
Heatrae Sadia Megaflo Eco Indirect Cylinder 70L
£1029.98
ex. VAT £858.32 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: 66596
Joule Invacyl Slimline Indirect Unvented Cylinder 120L
£675.98
ex. VAT £563.32 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: 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: 19925
RM Optimum Stainless Steel Direct Unvented Hot Water Cylinder 1280 x 545 180L
£599.98
ex. VAT £499.98 Each
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For delivery only
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: 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: 13300
Joule Invacyl Unvented Direct Cylinder 120L
£493.98
ex. VAT £411.65 Each
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For delivery only
Product code: 54595
Heatrae Sadia Megaflo Eco Direct Cylinder 70L
£818.98
ex. VAT £682.48 Each
Select from 6 options
For delivery only