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Old July 9th 19, 07:53 PM posted to uk.d-i-y
Jim GM4DHJ ... Jim GM4DHJ ... is offline
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Default Self employed builder/drainage LS25 ?

On 09/07/2019 18:49, Harry Bloomfield wrote:
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.

strange if it is trapped