Browse Forums General Discussion Re: Guttering overflows 6Jun 04, 2010 10:03 pm Height difference, pipe diameter, roof area, etc are inter-related. I have 90mm pipes, approx 100 sqm going into the tank, and height difference of approx 45cm. My gutters have overflow slots that are only about 7cm above the bottom of the gutter. My gutters overflow during moderately heavy rain. Chris Yes, get a builder, make sure he is experienced and a registered building practitioner 5 7552 The two 15mm holes are obviously not compliant. The Dept of Fair Trading would love to see this one! Do the gutters pool water after it stops raining? Although it's… 4 3915 |