Expansion vessel....

[ashtonvillageuk]

It appears my expansion vessel is coming to the end of the road.....the model of boiler is a Ravenheat fan/combi 820T......I would appreciate an approximate cost of installing a replacement vessel?

Many thanks.

 

[muggles]

What makes you think it needs replacing? The vessel itself is about £80+vat, and it'll cost you quite a bit to get it done as the boiler has to be removed from the wall to access the vessel. Allow half a day, so say £200-ish. @ecowarrior is near you and might be interested, or he might suddenly discover he's very busy. I wouldn't blame him

 

[snes]

If you have room, an external expansion tank would be a lot cheaper option.

But, as Muggles hinted, this is a Ravenheat. Many things have been known to fail on them.

 

[Agile]

Why do you think it has failed?

 

[ashtonvillageuk]

Many thanks.......I've had an engineer out to have a look as the pressure on the gauge was down to 1bar cold and 3bar when hot.....the vessel was re-pressurised(1bar). The pressure on the gauge is now 1.1 when cold and 2 when hot.....a slight improvement.

 

[Agile]

You can only repressurise properly by having zero pressure in the system ALL the time while you pump in the air.

 

[matz]

we had an external vessel installed on an old combi cost about £200. Previous fitter had written off the boiler due to expansion vessel fail....

 

[ashtonvillageuk]

I don't have the room unfortunately for a an external vessel as the boiler is in a small cupboard in the bathroom. The original will have to be replaced.