I know what wiped joints are, thats why i asked.
Why use an expensive material that is very labour intensive when there are products like Hepworth pipe (a form of earthernware but stronger) or HDPE. Both are approved or commercial work and both are a lot easier and quicker to install. Any pipe for the removal of waste water can be placed under ground and not be crushed as long as it is correctly bedded.
So it just seems strange to go that far over board.
Sylvan, thought you where going to Sydney for the Olympics ?? Nice lighting of the torch in the stadium