36mm OD pipe to 36mm OD pipe internal fitting only

[JohnQuill]

Hi, hoping someone can help me here. I have a 36mm OD solvent drain pipe that is cracked and has a piece missing at the concrete surface (circled in red in the attached pic).
I don't want to have to dig out the concrete floor. I could cut the pipe about 2cm above the concrete surface. I could then get a smaller diameter pipe that I can fit inside the existing pipe to cover the crack and extend the pipe upwards? This could then be solvent welded or fixed with silicone. Does this sound like a good idea?

 

[oldbutnotdead]

Sounds like a massive bodge but worth a go cos it's knackered anyway. Looks as if the missing bit is on a bend, you might be better stuffing some flexible pipe down it then sealing the flex to the hole with silicon (solvent needs quite a snug fit to get a good bond, unlikely you'll achieve that).

 

[lostinthelight]

Sealing against toxic gases escaping may be more difficult

 

[dilalio]

Should be screed rather than concrete and easy to remove. Do it properly.

 

[Madrab]

Does this sound like a good idea

Nope ... You don't get an internal coupler like you are suggesting, so anything you'd be using would be bespoke, made up and may not work properly.

 

[JohnQuill]

ok, thanks all for your advise. looks like I'll have to get the concrete/screed removed and put in a proper connection. Time to get a plumber on the case,

 

[dilalio]

ok, thanks all for your advise. looks like I'll have to get the concrete/screed removed and put in a proper connection. Time to get a plumber on the case,

Not necessarily. Do the excavation yourself. Do it carefully and you stand less chance of further damaging "good/sound" pipe from which you can join on to.

Don't go "chasing the ace".