Worcester Greenstar Expansion vessel

[markadams]

Hi,

Serviced a boiler today that was over pressurising when heating up, so thought it would be a simple case of drain down and re-pressurise the vessel. tried that and found that the vessel would not take any pressure as if the valve was blocked, I removed the schrader valve but no change.

Any one else come across this? I removed the flexi hose which had debris in but not blocked.

 

[ShaunCorbs]

Rubber stuck to the wall of the vessel due to over expanding needs a new one you might be lucky and free it off with about 4-6 bar of pressure but normally overstretched etc

 

[firemant]

Rubber stuck to the wall of the vessel due to over expanding needs a new one you might be lucky and free it off with about 4-6 bar of pressure but normally overstretched etc

Agreed, no point in wasting any more time. Change it

 

[Harvest Fields]

Rubber stuck to the wall of the vessel due to over expanding needs a new one you might be lucky and free it off with about 4-6 bar of pressure but normally overstretched etc

As above mate. Either whack a shed load of pressure through it or quote for a new one. Space for an external?

 

[markadams]

Going to quote for both a replacement and an external, dont really fancy installing a replacement as its 3 floors up in a tiny cupboard with a horizontal flue.

 

[ShaunCorbs]

Going to quote for both a replacement and an external, dont really fancy installing a replacement as its 3 floors up in a tiny cupboard with a horizontal flue.

much space above the boiler?

 

[Harvest Fields]

much space above the boiler?

If it is a vertical with 300mm easy job. If not don’t quote the replacement (unless you want to)

 

[markadams]

Reasonable amount above but flue is cemented on both sides and dont fancy going up a ladder to remove the flue.

 

[breakdown]

Just remove boiler off the jig easier to replace expansion vessel and prv.