I HAVE FITTED LARGE BORE COPPER - OR SO I THOUGHT! 108mm! goodness me, why copper? ive fitted and welded and screwed and other techniques on steel and galvo but not copper.
did they do a spring for it?
Believe it or not a soil stack in my house I was building, I wanted a corner branch to pick up 2 W/C's, and Grahams in Liskeard wanted the best part of 40 quid for just one branch, "special order and its got to be made, 3 months wait", they only stocked Key Terrain
It was sight easier to buy a 6 mtr length of 108 mm table X, I think the hard thinner walled tube, think that it cost around £45 / £50, only took a couple of hours to knock up the two 108 branches, plus quarter of an hour to knock up each 42 mm branch
I have seen a 108 mm/4" spring used, stupid burr gers did not anneal the copper tube first and they used a hydraulic bender, in one go so the bend came out rippled to hell and back
Glaxo's at Barnard Castle laboratories was all copper wastes, hand knocked up and hard soldered, the Barbican used a fair bit of copper, so did the luxuary block of flats next to Madam Tausauds, this was all copper, soils, wastes, rainwater plus the services, with 150 mm headers for the cold water tanks, the Old Bailey had 108 mm copper tube with lose flanges the internal part of the flange was Spelter braized