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
£54.78
ex. VAT £45.65 Each
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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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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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Product code: 50787
RM Optimum Stainless Steel Indirect Unvented Hot Water Cylinder 1470 x 545 210L
£769.98
ex. VAT £641.65 Each
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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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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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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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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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Product code: 63781
Joule Invacyl Slimline Direct Unvented Cylinder 120L
£591.98
ex. VAT £493.32 Each
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Product code: 51742
Joule Invacyl Unvented Indirect Cylinder 210L
£647.98
ex. VAT £539.98 Each
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Product code: 30686
Joule Invacyl Unvented Indirect Cylinder 250L
£699.98
ex. VAT £583.32 Each
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Product code: 64909
Joule Invacyl Slimline Direct Unvented Cylinder 180L
£609.98
ex. VAT £508.32 Each
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Product code: 18984
Ball Valve Pack
£15.58
ex. VAT £12.98 Each
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Product code: 38349
Water Storage Tank LWH: 442 x 296 x 305mm 4 Gallon
£10.28
ex. VAT £8.57 Each
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Product code: 90455
Heatrae Sadia Megaflo Eco Direct Cylinder 125L
£949.98
ex. VAT £791.65 Each
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Product code: 13300
Joule Invacyl Unvented Direct Cylinder 120L
£493.98
ex. VAT £411.65 Each
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Product code: 61470
Water Tank Jacket 50 Gallon
£22.38
ex. VAT £18.65 Each
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Product code: 89200
4 Panel Cylinder Jacket 42 x 18"
£19.98
ex. VAT £16.65 Each
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Product code: 64278
Expansion Vessel 18L
£34.98
ex. VAT £29.15 Each
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Product code: 96498
Joule Invacyl Unvented Direct Cylinder 180L
£534.98
ex. VAT £445.82 Each
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Product code: 81978
Joule Invacyl Slimline Indirect Unvented Cylinder 210L
£704.98
ex. VAT £587.48 Each
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Product code: 29704
Expansion Vessel 8L
£24.98
ex. VAT £20.82 Each
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Product code: 70204
Expansion Vessel 12L
£29.98
ex. VAT £24.98 Each
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Product code: 65632
Tesla Long Life Incoloy Immersion Heater & Resettable Thermostat 27"
£27.98
ex. VAT £23.32 Each
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