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.

Chaffoteaux 60000227 Expansion Vessel

Part: 60000227

Price: £102.40
Glowworm 0020020744 Flexicom Expansion Vessel

Part: 0020020744

Price: £79.95
Heatline Expansion Vessel 7 Litre D002209497

Part: D002209497

Price: £157.28
Sime 5139110 Friendly Expansion Vessel

Part: 5139110

Price: £59.41
Baxi Expansion Vessel 5117636

Part: 5117636

Price: £97.68
Potterton Expansion Vessel 5114691

Part: 5114691

Price: £63.66
Vokera 7620 Mynute Expansion Vessel

Part: 7620

Price: £95.40
Main Expansion Vessel 5106287

Part: 5106287

Price: £109.57
Vokera 10028603 Expansion Vessel Flexi Pipe

Part: 10028603

Price: £13.32
Baxi 248024 Combi Expansion Vessel

Part: 248024

Price: £51.95
Worcester Expansion Vessel 10L 87154071760

Part: 87154071760

Price: £195.43
Main Expansion Vessel 720542301

Part: 720542301

Price: £69.63
Baxi 26009157 Vessel

Part: 26009157

Price: £123.11
Vaillant 181051 EcoTec Expansion Vessel

Part: 181051

Price: £80.00
Vokera 1830 Linea Expansion Vessel

Part: 1830

Price: £72.95
Worcester Expansion Vessel 10L 87161083880

Part: 87161083880

Price: £85.00
Potterton Expansion Vessel 12 Litre 5106287

Part: 5106287

Price: £109.57
Ideal 079268 Sprint DHW Expansion Vessel

Part: 079268

Price: £90.84
Ferroli 36801790 DHW Expansion Vessel

Part: 36801790

Price: £38.16
Main Expansion Vessel 5113000

Part: 5113000

Price: £78.46
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