Baxi combi instant 105 HE

[Anton]

Hi, I have a Baxi combi instant 105 HE leaking water from the rear of the boiler. I am assuming it is the combined expansion vessel/dhw storage vessel leaking. There is no evidence of water inside the combustion chamber. It's difficult/impossible to see where it's coming from. The boiler is losing system pressure. Has anyone had one of these leak before? I have only had to replace them in the past due to failure of the vessel but not through leakage.
Many thanks.

 

[diamondgas]

Like yourself Anton I haven't had one leak ... Did you check the schrader valve to see if it was coming out of there?

 

[Anton]

The shraeder valve was the 1st thing I went for, but it was dry. Going back tomorrow with a new vessel, unfortunately it's a boiler off the wall job.
The big problem is not being able to see anything of where it's coming from. There are two connections to this ev and the water was coming down where the right hand connection is. There's nothing else behind the boiler where it could come from apart from the ev, so I'll have to go for replacing it.

 

[diamondgas]

The shraeder valve was the 1st thing I went for, but it was dry. Going back tomorrow with a new vessel, unfortunately it's a boiler off the wall job.
The big problem is not being able to see anything of where it's coming from. There are two connections to this ev and the water was coming down where the right hand connection is. There's nothing else behind the boiler where it could come from apart from the ev, so I'll have to go for replacing it.

It wasn't raining at the time was it? Just a thought

 

[Whn1]

Could take the boiler off the wall and then pressurise it, may get a better look at where it's coming from?


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I am here: http://tapatalk.com/map.php?sh3054

 

[Anton]

It wasn't raining at the time was it? Just a thought

No, just for a change it wasn't raining.
I just love British summertime, It has to be the best day of the year.

 

[Anton]

An update: Took the boiler off the wall today. Removed the combined ev/dhw storage vessel out. At 1st glance it looked in perfect condition.
Until I pulled off the insulation cover. The front wall of the ev was covered in brown/black sludge from a pinhole caused by corrosion.

 

[diamondgas]

Thanks for the update Anton ...