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: 65632
Tesla Long Life Incoloy Immersion Heater & Resettable Thermostat 27"
£27.98
ex. VAT £23.32 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: 89200
4 Panel Cylinder Jacket 36 x 18"
£16.68
ex. VAT £13.90 Each
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Product code: 72473
Expansion Vessel 25L
£39.98
ex. VAT £33.32 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: 85485
T-BAR Expansion Vessel Fixing Bar Kit
£44.98
ex. VAT £37.48 Each
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Product code: 37570
Byelaw 30 Tank Kit 4 Gallon
£24.98
ex. VAT £20.82 Each
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Product code: 40149
Tesla Copper Immersion Heater & Resettable Thermostat 27"
£23.98
ex. VAT £19.98 Each
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Product code: 97382
4 Panel Cylinder Jacket 42 x 18"
£22.38
ex. VAT £18.65 Each
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Product code: 12098
Water Storage Tank LWH: 508 x 860 x 515mm 25 Gallon
£34.07
ex. VAT £28.39 Each
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Product code: 38630
Joule Invacyl Unvented Direct Cylinder 300L
£698.98
ex. VAT £582.48 Each
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Product code: 18313
Joule Invacyl Slimline Direct Unvented Cylinder 210L
£645.98
ex. VAT £538.32 Each
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Product code: 14121
Expansion Vessel Bracket 5 to 24L
£22.28
ex. VAT £18.57 Each
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Product code: 12829
Tesla Copper Immersion Heater & Resettable Thermostat 11"
£19.98
ex. VAT £16.65 Each
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Product code: 67700
Storage Tank Lid 4 Gallon
£4.18
ex. VAT £3.48 Each
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Product code: 48463
Tesla Expansion Vessel Service Valve
£15.68
ex. VAT £13.07 Each
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Product code: 47335
Storage Tank Lid 25 Gallon
£19.57
ex. VAT £16.31 Each
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Product code: 17512
Water Tank Jacket 25 Gallon
£13.18
ex. VAT £10.98 Each
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Product code: 40164
Byelaw 30 Kit
£10.48
ex. VAT £8.73 Each
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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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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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Product code: 73635
Joule Invacyl Slimline Indirect Unvented Cylinder 90L
£663.98
ex. VAT £553.32 Each
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Product code: 90334
Joule Invacyl Slimline Direct Unvented Cylinder 60L
£569.98
ex. VAT £474.98 Each
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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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