basin waste connector options

[mackers]

Hello everyone. I'm bringing on a job before my plumber comes. It's a downstairs toilet and basin in the old pantry. I'm leaving all copper exposed including copper wastepipe and using copper elbows. There are two easy solutions to where my waste pipe will exit. I can either use a boss into the soil pipe or use a mcalpine elbow and spray it copper onto the grey waste exit you can see on the pic. My question is: I'd really like to find a way of sealing the copper elbow onto the grey waste protruding from the wall. It fits snuggly on, but obviously no seal at the moment. Has anyone got any knowledge of washer inserts into copper elbows, or had any success using just silicone, or know of any other solution??? Cheers

 

[Best]

If you just glued the copper bend onto the plastic waste pipe it would be at your own risk. I would have tried to have the waste pipe hidden or as neat as possible, perhaps some boxed in.
Depends on whether pipe is for solvent weld or push fit to which plastic bends you could use.
You can get a bend for onto pan with a boss for basin waste connection.
Tec7 or similar Polymer sealant is good, but I would keep the joint on view forever.

 

[mackers]

Thanks for that I've bought a 3M length of 35mm copper waste which attaches to a copper polished p-trap here Thomas Crapper & Co Ltd Washbasin P Trap . In the upstairs bathroom, everything above floor-level is copper exposed, and I broke the bank with a copper bath. I'm into exposed copper pipework rather than boxing in, welded (not compression joints), steampunk-style gate valves as isolators and 'snotless', polished pipework on display with brass hospital-style brackets. I think I'll ask the plumber to try sealing the copper elbow onto the grey plastic waste and see if it performs as water-tight, but was just wondering if anyone had an alternative solution.

 

[Best]

Really would have needed a plastic push fit waste fitting into wall and copper pushed into it, if the copper couldn't be taken to outside.
If you had have needed an old original copper high level cistern, I know a guy who has one

 

[ShaunCorbs]

can you get behind the board if so you could put a plastic male iron, flush with the wall but have the threads sticking out then just get a female iron to copper