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: 38349
Water Storage Tank LWH: 442 x 296 x 305mm 4 Gallon
£10.28
ex. VAT £8.57 Each
Out of stock for delivery
Product code: 49934
Expansion Vessel Control Kit
£53.88
ex. VAT £44.90 Each
Out of stock for delivery
Product code: 37570
Byelaw 30 Tank Kit 4 Gallon
£24.98
ex. VAT £20.82 Each
Out of stock for delivery
Product code: 61470
Water Tank Jacket 50 Gallon
£22.38
ex. VAT £18.65 Each
Select from 1 option
Out of stock for delivery
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: 93426
Joule Invacyl Slimline Indirect Unvented Cylinder 180L
£703.98
ex. VAT £586.65 Each
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For delivery only
Product code: 64278
Expansion Vessel 18L
£34.98
ex. VAT £29.15 Each
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Out of stock for delivery
Product code: 98639
Heatrae Sadia Megaflo Eco Indirect Cylinder 300L
£2079.98
ex. VAT £1733.32 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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Out of stock for delivery
Product code: 57431
Heatrae Sadia Megaflo Eco Indirect Cylinder 170L
£1459.98
ex. VAT £1216.65 Each
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For delivery only
Product code: 70204
Expansion Vessel 12L
£29.98
ex. VAT £24.98 Each
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Out of stock 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: 26919
Ariston Andris Expansion Vessel & Non-Return Valve KIT A
£43.82 was £54.78
ex. VAT £36.52 Each
Out of stock for delivery
Product code: 97382
5 Panel Cylinder Jacket 42 x 18"
£22.98
ex. VAT £19.15 Each
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Out of stock for delivery
Product code: 17512
Water Tank Jacket 25 Gallon
£13.18
ex. VAT £10.98 Each
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Out of stock for delivery
Product code: 85485
T-BAR Expansion Vessel Fixing Bar Kit
£44.98
ex. VAT £37.48 Each
Out of stock for delivery
Product code: 24405
Heatrae Sadia Megaflo Eco Indirect Cylinder 125L
£1090.98
ex. VAT £909.15 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
Select from 5 options
For delivery only
Product code: 55265
Joule Invacyl Slimline Indirect Unvented Cylinder 150L
£690.98
ex. VAT £575.82 Each
Select from 4 options
For delivery only
Product code: 57767
Joule Invacyl Slimline Direct Unvented Cylinder 150L
£604.98
ex. VAT £504.15 Each
Select from 5 options
For delivery only
Product code: 35834
Heatrae Sadia Megaflo Eco Indirect Cylinder 210L
£1724.98
ex. VAT £1437.48 Each
Select from 6 options
For delivery only