Big headache

[virtuallysorted]

So I badly messed up.

First I poured concrete over some pipes that were laid for a new rad and a sink.

Second I put a cut with a chisel into a copper bend of a pipe while chipping away some concrete.

Two questions.

I know the pipes should have first been lagged to allow wiggle room for expansion.

Is it a given that when pipes expand they will crack? I know some old underfloor heating has just this done to copper pipes.

Lastly the cut I made. Not leaking at all at the moment. But the pipe isn't hot at the moment so guessing when it is, it's more likely to burst.

Will putting solder in the dent help?

 

[gary plumb]

Lagging not just for expansion its to stop cement corroding copper.

 

[johnny2007]

Unfortunately you need to dig those pipes out and redo.

 

[denso13]

Yes, you should have allowed for expansion, but it is what it is now, I don't think I'd dig it all out.

The nick in the pipe looks quite deep but if not leaking now it won't suddenly burst. It will be a weak point though.