Hi, need to replace a failed boiler expansion vessel* how critical is it
to place an additional (replacement) expansion vessel close to the boiler?
From what I read it seems the concensus is as close to the boiler as
possible or Bad Things will happen, but I've also seen installations
where a system boiler has an expansion vessel in a remote cupboard. So
it can't be all that bad?

*Vaillant, so no surprise there, but it did manage to last a few years.
I really don't want to demount the boiler to replace the internal one
and space around the boiler is very limited, hence the question.

On 05/06/2019 11:31, Lee wrote:
Hi, need to replace a failed boiler expansion vessel* how critical is it
to place an additional (replacement) expansion vessel close to the boiler?
From what I read it seems the concensus is as close to the boiler as
possible or Bad Things will happen, but I've also seen installations
where a system boiler has an expansion vessel in a remote cupboard. So
it can't be all that bad?

*Vaillant, so no surprise there, but it did manage to last a few years.
I really don't want to demount the boiler to replace the internal one
and space around the boiler is very limited, hence the question.

Doesn't really matter IMHO.

On 05/06/2019 11:31, Lee wrote:
Hi, need to replace a failed boiler expansion vessel* how critical is it
to place an additional (replacement) expansion vessel close to the boiler?
From what I read it seems the concensus is as close to the boiler as
possible or Bad Things will happen, but I've also seen installations
where a system boiler has an expansion vessel in a remote cupboard. So
it can't be all that bad?

*Vaillant, so no surprise there, but it did manage to last a few years.
I really don't want to demount the boiler to replace the internal one
and space around the boiler is very limited, hence the question.

Mine is in my loft, where the old feed tank was.

I can't see why it would need to be close to the boiler.

On 05/06/2019 11:31, Lee wrote:

Hi, need to replace a failed boiler expansion vessel* how critical is it
to place an additional (replacement) expansion vessel close to the boiler?
From what I read it seems the concensus is as close to the boiler as
possible or Bad Things will happen, but I've also seen installations
where a system boiler has an expansion vessel in a remote cupboard. So
it can't be all that bad?

The location of it is not really that important.

*Vaillant, so no surprise there, but it did manage to last a few years.
I really don't want to demount the boiler to replace the internal one
and space around the boiler is very limited, hence the question.

Most modernish Vaillant boilers have a very easy to get at expansion
vessel - typically on the right hand side of the case. Vis (silver thing
top right):

http://wiki.diyfaq.org.uk/index.php/...cotec824HE.png


--
Cheers,

John.

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On Wednesday, 5 June 2019 11:31:54 UTC+1, Lee wrote:
Hi, need to replace a failed boiler expansion vessel* how critical is it
to place an additional (replacement) expansion vessel close to the boiler?
From what I read it seems the concensus is as close to the boiler as
possible or Bad Things will happen, but I've also seen installations
where a system boiler has an expansion vessel in a remote cupboard. So
it can't be all that bad?

*Vaillant, so no surprise there, but it did manage to last a few years.
I really don't want to demount the boiler to replace the internal one
and space around the boiler is very limited, hence the question.

makes little difference where it is as long as it never gets cut off from the boiler primary circuit.


NT

Lee wrote:
Hi, need to replace a failed boiler expansion vessel* how critical is it
to place an additional (replacement) expansion vessel close to the boiler?
From what I read it seems the concensus is as close to the boiler as
possible or Bad Things will happen, but I've also seen installations
where a system boiler has an expansion vessel in a remote cupboard. So
it can't be all that bad?

*Vaillant, so no surprise there, but it did manage to last a few years.
I really don't want to demount the boiler to replace the internal one
and space around the boiler is very limited, hence the question.


Our boiler is in the loft, our expansion tank in in the garage. Has worked
fine for the last ten years. I would say that its not that critical. ;-)

Tim

--
Please don't feed the trolls

On Wed, 5 Jun 2019 07:08:46 -0700 (PDT), wrote:

makes little difference where it is as long as it never gets cut off from the boiler primary circuit.

Install a cutoff valve anyway, thus ensuring that the expansion vessel will
never fail because now you can swap it out with ease?


Thomas Prufer

On Wednesday, 5 June 2019 15:47:37 UTC+1, Thomas Prufer wrote:
On Wed, 5 Jun 2019 07:08:46 -0700 (PDT), tabbypurr wrote:

makes little difference where it is as long as it never gets cut off from the boiler primary circuit.

Install a cutoff valve anyway, thus ensuring that the expansion vessel will
never fail because now you can swap it out with ease?


Thomas Prufer

I've seen plumbing jobs where it looks like someone was working with Es.


NT

On 05/06/2019 14:29, John Rumm wrote:
snip

Most modernish Vaillant boilers have a very easy to get at expansion
vessel - typically on the right hand side of the case. Vis (silver thing
top right):

http://wiki.diyfaq.org.uk/index.php/...cotec824HE.png



It would be nice, but there isn't enough clearance above the boiler to
remove the Expansion vessel in situ - at least according to Vaillant anyway.

This one has the flat red vessel at the back, the one in the link does
look easier to change.

Well that's that settled then

It's going in a convenient space in a storage cupboard - about 4m from
the boiler. The CH pipes already run through said cupboard so should be
straightforawrd...

On 05/06/2019 15:47, Thomas Prufer wrote:
On Wed, 5 Jun 2019 07:08:46 -0700 (PDT), wrote:

makes little difference where it is as long as it never gets cut off from the boiler primary circuit.

Install a cutoff valve anyway, thus ensuring that the expansion vessel will
never fail because now you can swap it out with ease?


Thomas Prufer


Given the poor service life reported for two of the brands I looked at,
this might not be a bad idea!

Thanks everyone.

Lee Wrote in message:
Well that's that settled then

It's going in a convenient space in a storage cupboard - about 4m from
the boiler. The CH pipes already run through said cupboard so should be
straightforawrd...



Put it low down & it can "air" the cupboard, a bit (like the good
old days, a bit) :-)
--
Jim K


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