Solly weld screw up

A couple of years ago I put a 40mm solvent weld pipe in, when I built the extension, and shuttered a square out ready to put a wet room gully trap on it. However I’ve realised I’ve messed up and solvent welded an elbow on, which brings the height too high for the gully. Easier explained by the picture, but I’m guessing I need to break the concrete out and expose the horizontal run of the pipe, cut and fix a new elbow on or a couple of 45s, to get me to the correct trap spigot height. If anyone’s got any other ideas like somehow dismantling the already glued (2 years ago) joint, I’m all ears! Otherwise I’ll be getting the breaker out.
cheers

Get the breaker out. The solvent in the glue chemically melts and fuses the fitting and pipe together. You won't get them apart again

Cool cheers for confirming

You can take apart solvent weld fittings. Not the hardest thing in the world. You need room to work though so you may have to get the breaker out anyway.

If you do a lateral cut in either the inside of the pipe or the outside of the fitting depends on what you want to keep/take apart (being careful not to cut all the say through tto the part you need. Then apply solvent weld all yhe way around the inside or outside, again depending on what bit that your keeping. Then set the solvent glue alight and wait for it to get to the right temperature (this is the tricky bit as it comes with experience knowing when its at the right temp).

Then use a flat headed screwdrivee to start levering it apart.

I know this sounds like chaos if youve not seen it done before but its really not that hard. Dont breath in the smoke though .

Ive had to do this numerous times where other plumbers had messed up or anoyher trade had snapped a smaller 32 or 40mm pipe off with not enough pipe left to repair as its been right on the boss adapter and to repair otherwise would mean redoing part of the stack.

Thanks, sounds a bit scary so I might stick with just breaking it out. I can see why you’d want to do it on a soil stack but I reckon I’m better cutting my losses on this one. Breathing solvent fumes is bad enough when it’s not on fire too

Hot air gun works.

just pumps said:

Hot air gun works.

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Does it.? In general i have found them impossible to dismantle and far easier/quicker to start again.

durhamplumber said:

Does it.? In general i have found them impossible to dismantle and far easier/quicker to start again.

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It works best on smaller diameter joints with good access to the fitting where you can apply the heat all around the joint that said I agree sometimes it is easier and quicker to cut back and start again.