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 5113000

Part: 5113000

Price: £78.46
Main Expansion Vessel 235883

Part: 235883

Price: £132.56
Vokera 10028603 Expansion Vessel Flexi Pipe

Part: 10028603

Price: £13.32
Alpha 1.023560 Expansion Vessel

Part: 1.023560

Price: £82.00
Baxi 5113000 Combi Instant Expansion Vessel

Part: 5113000

Price: £78.46
Sime 5139110 Friendly Expansion Vessel

Part: 5139110

Price: £59.41
Chaffoteaux 60000227 Expansion Vessel

Part: 60000227

Price: £102.40
Saunier Duval 0020057805 7L Expansion Vessel

Part: 0020057805

Price: £126.37
Chaffoteaux 65101719 Expansion Vessel

Part: 65101719

Price: £106.26
Ideal 176865 Vogue Expansion Vessel

Part: 176865

Price: £80.43
Baxi 238395 Genesis Expansion Vessel

Part: 238395

Price: £65.65
Ariston 999403 Genus DHW Expansion Vessel

Part: 999403

Price: £88.75
Ferroli 36801790 DHW Expansion Vessel

Part: 36801790

Price: £38.16
Main Expansion Vessel 5106287

Part: 5106287

Price: £109.57
Saunier Duval Expansion vessel 8 LT 801666

Part: 801666

Price: £90.05
Main Expansion Vessel 5114692

Part: 5114692

Price: £73.18
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