Hi

I have a Vaillant Ecomax boiler installed upstairs in a cupboard with
a vertical flue running up through a pitched roof.

When its windy and it rains water seems to be running down the ouside
of the flue and sitting on the top of the boiler. I've had the roof
checked on several ocassions with no evidence of any problems. As this
only occurs in windy conditions my theory is that rain is getting
driven into the flue.

Can anyone offer any ideas as to why the water seems to be running
down the outide of the flue? (incorrect flue installation?)

Thanks

BR

On 29 Jun, 14:35, wrote:


When its windy and it rains water seems to be running down the ouside
of the flue and sitting on the top of the boiler. I've had the roof
checked on several ocassions with no evidence of any problems. As this
only occurs in windy conditions my theory is that rain is getting
driven into the flue.

I've had a similar problem with a Vaillant Ecomax. I have mine in an
attached garage under a flat roof. New boiler and new roof only 2
years ago and the roof checks out OK.

I had a drip tray under it and sometimes after it had rained it have
collected water and other times it would not. I could never work out
the exact criteria that had to prevail to make it drip. And I never
caught it in the act so to speak - just that sometimes after it had
rained would there be water there. Other times there would be. Now
that you mention it, a wind & rain combination could well be it.

I'll monitor it more closely again in future and will keep you posted.

In article . com,
Dulwich writes:
On 29 Jun, 14:35, wrote:


When its windy and it rains water seems to be running down the ouside
of the flue and sitting on the top of the boiler. I've had the roof
checked on several ocassions with no evidence of any problems. As this
only occurs in windy conditions my theory is that rain is getting
driven into the flue.

I've had a similar problem with a Vaillant Ecomax. I have mine in an
attached garage under a flat roof. New boiler and new roof only 2
years ago and the roof checks out OK.

I had a drip tray under it and sometimes after it had rained it have
collected water and other times it would not. I could never work out
the exact criteria that had to prevail to make it drip. And I never
caught it in the act so to speak - just that sometimes after it had
rained would there be water there. Other times there would be. Now
that you mention it, a wind & rain combination could well be it.

I'll monitor it more closely again in future and will keep you posted.

Guessing here, but water that get into the flue pipe will
run down the inside wall, and at each joint will tend to be
transferred to the outside of the flue pipe if the joint is
not perfectly sealed.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On 29 Jun, 20:23, (Andrew Gabriel) wrote:
In article . com,
Dulwich writes:





On 29 Jun, 14:35, wrote:

When its windy and it rains water seems to be running down the ouside
of the flue and sitting on the top of the boiler. I've had the roof
checked on several ocassions with no evidence of any problems. As this
only occurs in windy conditions my theory is that rain is getting
driven into the flue.

I've had a similar problem with a Vaillant Ecomax. I have mine in an
attached garage under a flat roof. New boiler and new roof only 2
years ago and the roof checks out OK.

I had a drip tray under it and sometimes after it had rained it have
collected water and other times it would not. I could never work out
the exact criteria that had to prevail to make it drip. And I never
caught it in the act so to speak - just that sometimes after it had
rained would there be water there. Other times there would be. Now
that you mention it, a wind & rain combination could well be it.

I'll monitor it more closely again in future and will keep you posted.

Guessing here, but water that get into the flue pipe will
run down the inside wall, and at each joint will tend to be
transferred to the outside of the flue pipe if the joint is
not perfectly sealed.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]- Hide quoted text -

- Show quoted text -

Yes, thats my guess too!.......I've now spoken to Vaillant tech
support and they confirm that any rain driven into the flue should
flow into the condensate drain. So, it looks like at least one joint
in the flue isn't correctly sealing.

Thanks

On 29 Jun 2007 19:23:28 GMT, (Andrew
Gabriel) wrote:

In article . com,
Dulwich writes:
On 29 Jun, 14:35, wrote:


When its windy and it rains water seems to be running down the ouside
of the flue and sitting on the top of the boiler. I've had the roof
checked on several ocassions with no evidence of any problems. As this
only occurs in windy conditions my theory is that rain is getting
driven into the flue.

I've had a similar problem with a Vaillant Ecomax. I have mine in an
attached garage under a flat roof. New boiler and new roof only 2
years ago and the roof checks out OK.

I had a drip tray under it and sometimes after it had rained it have
collected water and other times it would not. I could never work out
the exact criteria that had to prevail to make it drip. And I never
caught it in the act so to speak - just that sometimes after it had
rained would there be water there. Other times there would be. Now
that you mention it, a wind & rain combination could well be it.

I'll monitor it more closely again in future and will keep you posted.

Guessing here, but water that get into the flue pipe will
run down the inside wall, and at each joint will tend to be
transferred to the outside of the flue pipe if the joint is
not perfectly sealed.

The joints on the outside of the concentric flue pipe dont appear to
be designed for a perfect seal - the pipes but together and just have
a clamp/sleeve over them.
Robert