It's because 40mm is the inside pipe dimension and 43 is the outside dimension
40mm= hole size 43mm= overall pipe sizeIts the same when you buy 32mm waste pipe it will say 36mm on the pipe but inside dimension will be 32mm
That depends on if its push fit or solvent weld - they are deliberately different. (but you can couple them with universal (i.e. compression) fittings.
Pipe sizes refer to the bore of the pipe and are nominal. If you are mixing makes, you have to use compression fittings as they often don't fit/match.
Apart from when they refer to the external diameter, and are accurate!
Funny that, never had a problem mixing and matching 15mm, 22mm, or 28mm copper pie from different makers.
Even with different brands of waste pipe, there is rarely a problem mixing so long as you buy the right type (i.e. solvent weld or push fit)
Yep, funny that. I wonder if it's got something to do with those British Standard thingies - like eg the way BS 5255 requires the outside diameters of 32/40/50 mm uPVC wastes to fall within a 0.3mm range. But perhaps Harry rolls his own.
Smoking them after does not seem to be doing him any good either!
replying to orion.osiris, John wrote: Actually there are 3 types of PVC waste pipe 11/4" (32mm) 11/2" (40mm) & 2" (50mm) which come in solvent weld and push fit type. the wall thickness on the push fit are slightly thinner so you cant use solvent weld fittings on push fit pipe or vice versa. However you can use compression type waste fittings on both types of waste pipe to join them together. Personally I would use solvent weld waste pipe as especially beneath floor boards as you know once is glued the job is generally done and no worries of any future leaks. Hope this helps!!
This might assist you with posting to a newsgroup, albeit through a website:
- If you are sending a reply to a message or a posting be sure you summarize the original at the top of the message, or include just enough text of the original to give a context.
Hope this helps too.
Don't you think orion.osiris would have finished his plumbing by now, over 4 years later?
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