I want to slightly modify the outside waste pipe from my sink which discharges to the drain surround that is less than ideal in that over time it has corroded away the concrete surround. I thought it was 40mm solvent weld and just want to angle it away with a 130 deg bend attached. I thought it would be cheaper and easier with a compression fitting which I understood should still go over 40mm solvent weld. But it won't. The OD seems to be ~44mm a fraction too much. The pipe could easily be over 20 years old or more but it is fixed tight through the wall and frankly isn't worth the hassle changing it inside where of course there have been more modern fittings. Thoughts? ideas?