I've set out the main part of my drainage, being old clay to new
inspection chamber to rest bend and soil pipe etc, with the gradient
at 1 in 40. Two other connections on the chamber are to connect to two
roddable bottle gullies (one under outside tap, other for rain water
runoff - combined sewer). If these gullies are connected to the
chamber mainly with straight pipe, the gradient will be a lot steeper
than 1 in 40. Is this OK, or do I need to use some kind of rest bend
from the gully so that the main run of pipe from gully to chamber is
about 1 in 40 ?
Of course, if the roddable feature is to be any use, then run needs to
basically be straight.
Thanks,
Simon.