Self employed builder/drainage LS25 ?
Jim GM4DHJ ... formulated on Tuesday :
if the rainwater has a trapped gully it is all going to a combined system
anyway so why bother?....
It has a trapped gulley, but no it is not combined. We have a two pipe
system, one (foul) goes off for treatment, the rain water one just goes
into a stream, then the river untreated.