re-charge expansion vessel on baxi combi 105

[jase1971]

Hi all,

I have water dripping from my boiler and I was told an issue may be the expansion vessel needs re-charging

Is this something I can do myself ?, and if so could somebody please tell me how to do it please ??

Many thanks

Jason

 

[namsag]

Water dripping? i take it you mean from the pipe that goes outside.
Empty boiler , at top of boiler there is a plate held in place with 4 screws remove this and you will see the top of the vessel with a valve with a cap on it .
Connect a foot pump with a gauge on it to the valve and pump up to 1 bar then replace cap and plate.

 

[jase1971]

Hi there,

Sorry I never made myself clear, yes there is water coming out of the outside overflow pipe, but it is also coming from inside the boiler itself (somewhere), as im not a plumber I cannot see exactly where it is coming from. But I was told it could be the expansion vessel that need to be re-pressured or that it is broken.

Jason

 

[linkyplumb]

How come you started a new thread?

A quick tell if the exp vessel is goosed, is undo the shraeder valve cap, and push in the pin.
If water comes out then the vessel is knackered. If not, then recharge it using a footpump. Need to isolate boiler and drain down first.
Recharge vessel to about 1 bar.

Graham

 

[Agile]

All covered in the FAQ which are best read before posting!

 

[jase1971]

How come you started a new thread?

A quick tell if the exp vessel is goosed, is undo the shraeder valve cap, and push in the pin.
If water comes out then the vessel is knackered. If not, then recharge it using a footpump. Need to isolate boiler and drain down first.
Recharge vessel to about 1 bar.

Graham

I did as you said with the pin and water was coming out so I guess it is goosed ! any idea on the cost of a new one at all and any idea on fitting costs (I am based in the Midlands)

Thank you Jason

 

[Agile]

Sometimes the EXV can be replaced with the boiler on the wall. But it can need to be taken off the wall so adding an external EXV is sometimes a better option.

Either way an RGI is needed as the flue has to be moved.

The only DIY solution is adding an external EXV.

Tony

 

[jase1971]

Sometimes the EXV can be replaced with the boiler on the wall. But it can need to be taken off the wall so adding an external EXV is sometimes a better option.

Either way an RGI is needed as the flue has to be moved.

The only DIY solution is adding an external EXV.

Tony

Thanks for the quick reply Tony, do you have any idea how much an expansion vessel costs for a baxi 105e boiler ?

Also what roughly is the difference in fitting time (for a plumber) regarding fitting an external EXV against the dreaded removing the boiler from the wall. This been done by a plumber and by myself as I wouldnt have a clue.

Cheers Tony

 

[Agile]

About £60 to buy.

About an hour to replace on wall IF the flue can easily be moved!

Nearly two hours to take off wall to replace.

Hourly charges vary from about £30 to £90.

I once did an off wall in about 40 min but that had gone very well which is unusual.

Tony