How do I join these two pipes on a domestic heating system

Odelay · 26-09-2022 6:49pm #1

Hi,

Gave the oil fired boiler a test run before things go too cold. Pipes in the attached separated. I do not have access to a crimper. How can I join these? Copper pipe fitting says 1", plastic pipe measured 30mm OD.

Plumber says it will be six weeks before he can get to me.

Once joined, I was thinking of lowering the pressure on the pressure relief valve, if that can be done, and adjust it up gradually until system was up to temperature and air out. Not concerned about a mess as the system is outside. The thinking behind this is I don't know why these pipes separated. This is the second join to go. First one was in February. Expansion vessel was tested then and no problem there.

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.Any help would be appreciated

AMKC · 26-09-2022 7:01pm

Ring around and try other plumbers. I am no plumber but it looks like a small enough job. Surely there is some plumber that could do it as a Nixer or as an evening job. Ask in the pub maybe if you go to the pub.

Where do you live? I know a couple of plumbers I could ask if you live near Kildare.

Odelay · 26-09-2022 7:26pm

Very few are answering phones, leaving messages but no call back. This time of year is a busy season for plumbers. I'm in a very rural area in the SE, old timers are few and far between. I'm able for most jobs, just not familiar with these light plastic pipes.

10-10-20 · 26-09-2022 7:52pm

I'm trying to work out whether that's a failed push-fit or a compression fitting (not a plumber!).

Is that copper pipe the hot feed from the boiler? If so, how long is it and are you overheating the water or having pump issues? I'm just wondering by virtue of the way which the pipe seems to have pulled off the joint with the melted residue? Is there much slack on the free insulated pipe?

If it's a standard plastic PEX double-barrier pipe then you could cut the crimp cleanly off it, install an insert and use a standard compression elbow on the end of that existing vertical pipe. Make up any remaining distance between the elbow and insulated pipe by creating a short pipe extension.

But long-term, that free piping should be supported in case that's part of your overall problem.