This part is in the boiler to protect the boiler from excessive surges and that the pressure within the boiler operates within safe parameters normally between 1 to 2.5 bar. The expansion vessel is filled half full of air and half full of water. The most common issues customer’s encounter when the expansion vessel is faulty is the boiler pressure builds to 3 bar and hot water starts to drip through the pressure relief valve and outside via the discharge pipe. When the boiler then cools down the pressure in the boiler falls to 0 bar and won’t fire up. The customer then has to fill the boiler back up by using the filling loop normally located below the boiler. Once the pressure in the boiler is back at 1 -1.5bar the boiler will start to work again.

Main Expansion Vessel 240388

Part: 240388

Price: £102.76
Baxi 238395 Genesis Expansion Vessel

Part: 238395

Price: £65.65
Main Expansion Vessel 720542301

Part: 720542301

Price: £69.63
Vokera 9266 Maxin Expansion Vessel

Part: 9266

Price: £91.41
Worcester Expansion Vessel 10L 87154072460

Part: 87154072460

Price: £216.39
Heatline D003200028 Capriz Vizo Expansion Vessel

Part: D003200028

Price: £160.42
Potterton Expansion Vessel 12 Litre 5106287

Part: 5106287

Price: £109.57
Potterton Expansion Vessel S62753

Part: S62753

Price: £78.34
Potterton Expansion Vessel 720542301

Part: 720542301

Price: £69.63
Potterton 248025 Pipe Expansion Vessel

Part: 248025

Price: £8.66
Alpha 1.023560 Expansion Vessel

Part: 1.023560

Price: £82.00
Ferroli 39846250 Modena HE Expansion Vessel

Part: 39846250

Price: £99.95
Worcester Expansion Vessel 10L 87154071760

Part: 87154071760

Price: £195.43
Glowworm 2000800694 Ultimate Expansion Vessel

Part: 2000800694

Price: £120.71
Ideal Expansion Vessel 19L 173193

Part: 173193

Price: £142.86
Ariston 60000227 Burner

Part: 60000227

Price: £115.02
Potterton 720778201 Hose Expansion Vessel

Part: 720778201

Price: £22.97
Chaffoteaux 65101719 Expansion Vessel

Part: 65101719

Price: £103.14
Vokera 4492 Flowmatic Expansion Vessel

Part: 4492

Price: £85.04
Vokera 7620 Mynute Expansion Vessel

Part: 7620

Price: £95.40
Ideal Expansion Vessel Kit 174812

Part: 174812

Price: £124.78
Ariston 999403 Genus DHW Expansion Vessel

Part: 999403

Price: £108.10
Vaillant Expansion Vessel - 0020127199

Part: 0020127199

Price: £172.60
Worcester Expansion Vessel 12 Litre 87161076600

Part: 87161076600

Price: £93.59
Heatline Expansion vessel 8Lt 0020126680

Part: 0020126680

Price: £99.95
Ferroli 36801790 DHW Expansion Vessel

Part: 36801790

Price: £41.98
Chaffoteaux 998616 Expansion Vessel

Part: 998616

Price: £72.68
Glowworm Energy 35 Store Expansion Vessel

Part: 0020048250

Price: £102.85
Main Expansion Vessel 5113000

Part: 5113000

Price: £78.46
Vaillant 181051 EcoTec Expansion Vessel

Part: 181051

Price: £80.00
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