output condensing fluid from boiler running onto Asbestos?

[yelf]

Hi all, sorry if this is the wrong forum.

My carport has an asbestos cement roof. We are looking to get a new boiler fitted which means having a pipe running out side to allow the fluid to run off.

would there be an issue of this running onto the asbestos?

 

[Aunsh]

I assume you mean the condensate outlet pipe. (There may also be another pipe connected to the pressure relief valve)

I suggest you talk to your installer, as I would expect he will tell you that the manufacturer's installation instructions will specify that the condensate has to be routed in plastic pipe to a drain, as the condensate is corrosive.

I would also suggest that the condensate pipe would be better run internally, if at all possible, as external condensate pipes are a known problem in freezing conditions. The condensate freezes in the pipe, blocking the pipe, then shutting the boiler down - not nice at this time of year.

Hope this helps.

 

[Mw Roofline]

You could pour liquid nitrogen onto your asbestos roof and it would still be fine.

Nevertheless still take advice from the previous poster.

 

[yelf]

Ok thank you. THe problem is there is no where easily accesible internally for it to be run to

 

[gasman1987]

all i would do id lay the 32mm along the slop og the roof into the guttering
but the down pipe has to go to a drain not a soakaway unless there is lime chipping and 600mm away from the building

 

[yelf]

the trouble there is the pipe would have to run 2 metres down the external wall to the roof of the car port, that + 2m more of piping will surely freeze?

 

[gasman1987]

i'v not had any call backs yet , any external condence will freeze in this weather even to mi and insulated

 

[adysam]

For the past two years due to the cold my condensing run off pipe has frozen. Last year I had to cut it, pour boiling water down it and re-join it as it was so frozen. This year I have cut it and it is draining into a bucket as it is so cold it will freeze again.
The main problem is the fact that the pipe runs outside for around 10 metres before it reaches the drain.
My plan for the future is to either run the pipe under the floor boards to the outside drain or, if this is not possible, make a join in the outside pipe which can be easily undone and drained off in the extreme cold. Not ideal but it solves the problem.
From my experience as long as the pipe is no longer than around 4 metres it won't freeze.

 

[ajrobb]

There have been so many posts about even large insulated condensate pipes freezing that I think you must consider trace heating.