Doing a Benchmark for our firm and just need to clarify following.
With an invert level of 1.5m does the foul drainage manhole need to be circular min 1050mm dia and with steps?
Does same apply with surface water manhole at 1.5m invert?
Thanks for ay info.
With an invert level of 1.5m does the foul drainage manhole need to be circular min 1050mm dia and with steps?
Does same apply with surface water manhole at 1.5m invert?
Thanks for ay info.