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combined sewer

  1. S

    40mm into soil pipe - need a trap?

    I have a permitted combined sewer, so the rain water can go into the waste water sewer. I have all the bits ready to take the gutter down pipe (currently just going straight onto the ground, :oops:) and connect it to the soil pipe (so 68mm -> 40mm then into existing soil pipe). My question is -...
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