22mm Condensate Pipe Elbows Failing

[techweb]

Seems to be a long term material compatibility issue between adhesive & condensate. Nobody's fault just unfortunate, well perhaps the adhesive manufacturer. See what your plumber has to say, he may be able to suggest an alternative route.

In my case, it seems failure of the elbows is the issue, as in they have cracked over time. My plumber suggested replacing the entire run and cutting into the stud wall to effect the replacement. Of course this is an easier thing to do rather than trying to fish for flexible cable etc but I will put this to him as an alternative.

 

[Ben-gee]

Can you attach a thin tough rope/string ( I use 4mm polypropylene line) to the existing pipe and then pull the pipe out from the other end - so you end up with the string along the route you want.
Then attach the new flexi pipe to the line and pull it through.

 

[techweb]

Can you attach a thin tough rope/string ( I use 4mm polypropylene line) to the existing pipe and then pull the pipe out from the other end - so you end up with the string along the route you want.
Then attach the new flexi pipe to the line and pull it through.

If the existing pipe was flexible, this would be an option. However, as the existing pipe is 22mm overflow pipe and it goes through a cavity, to pull it out between the wall and stud wall with limited access in the loft would be I suspect impossible.

I think fishing for a new flexible hose would be an option though...

What hose options exist? I would need a ~15m run.

 

[Ben-gee]

I think I’d be looking for a new route for the pipework in that case.

 

[techweb]

I think I’d be looking for a new route for the pipework in that case.

Any ideas on a flexible hose to use for this?

 

[gmartine]

The elbows are failing because the condensate (acidic) seems to be eventually reacting with the adhesive, there can't be any other reason for for elbows spliting and failing like that.
Given the length of run it might just be easier to install a condensate pump (if necesssary) and run it to a rainwater downpipe else where outside the building?

 

[techweb]

The elbows are failing because the condensate (acidic) seems to be eventually reacting with the adhesive, there can't be any other reason for for elbows spliting and failing like that.
Given the length of run it might just be easier to install a condensate pump (if necesssary) and run it to a rainwater downpipe else where outside the building?

I'd prefer to keep the run internal and use a flexible hose. The question is however which hose would be suitable for this application? It seems most are either 22 or 32 mm solid pipes.

I'll call a plumbers merchants to see what options they have and then discuss with my plumber.

 

[gmartine]

Not sure you can officially find flexi condensate pipe in much longer than 3m tbf.

It might require a little creative thinking and find say conduit that can be bought in much longer lengths, due diligence required as to the materials properties and resistance to condensate.