Ivan_England Posted June 12, 2020 Share Posted June 12, 2020 Hi guys, just did a course in Drainage and am now working out the design for my Newbuild. Here is the soil stack design let me know if that looks ok? I'll a fresh water and hot water one this weekend Link to comment Share on other sites More sharing options...
jamieled Posted June 12, 2020 Share Posted June 12, 2020 Maybe I've misinterpreted the drawing but I'd not be keen on running a pipe within the 110mm soil pipe. Stuff will get caught on it and it will be more difficult to rod. Link to comment Share on other sites More sharing options...
ProDave Posted June 12, 2020 Share Posted June 12, 2020 Why does the rainwater harvesting tank overflow need pumping and what can't that be in 110mm? Link to comment Share on other sites More sharing options...
ToughButterCup Posted June 12, 2020 Share Posted June 12, 2020 Oooooooooffff... Might you mean connect the rainwater overflow to the 110 ? As written it looks like you are running pipe-in-pipe...... Link to comment Share on other sites More sharing options...
Ivan_England Posted June 12, 2020 Author Share Posted June 12, 2020 4 hours ago, ToughButterCup said: Oooooooooffff... Might you mean connect the rainwater overflow to the 110 ? As written it looks like you are running pipe-in-pipe...... Hi, Yes I was told to do this by the manufacturer to protect the 25mm pipe from being damaged. 4 hours ago, ProDave said: Why does the rainwater harvesting tank overflow need pumping and what can't that be in 110mm? It needs to be pumped as it is lower down than the IC chamber it's connecting to. The garden slowly slopes down. So all looks then :)? Link to comment Share on other sites More sharing options...
ToughButterCup Posted June 12, 2020 Share Posted June 12, 2020 18 minutes ago, Ivan_England said: ... Yes I was told to do this by the manufacturer to protect the 25mm pipe from being damaged. ... Ok, quick email to the manufacturer then: along the lines , 'Please reassure me that previous similar installations have been acceptable to Building Control' Link to comment Share on other sites More sharing options...
ProDave Posted June 12, 2020 Share Posted June 12, 2020 Assuming you are using 25mm mdpe, it won't get damaged by burying it directly. It's used for most incoming water supplies with little more than a bit of sand to protect it from any stones in the ground. Link to comment Share on other sites More sharing options...
Conor Posted June 12, 2020 Share Posted June 12, 2020 25mm MDPE is as tough as old boots. Just don't have massive pointy rocks in the trench. Feed into rainwater tank should be above the top water level, and designed like an normal surface water drain. The way you have it will mean it will be surcharging and acting like a pressurised pipe, which it isn't. Link to comment Share on other sites More sharing options...
PeterW Posted June 12, 2020 Share Posted June 12, 2020 Rainwater overflow can’t go into your soil / sewer without permission - it has to go to soakaway. Link to comment Share on other sites More sharing options...
Ivan_England Posted June 13, 2020 Author Share Posted June 13, 2020 On 12/06/2020 at 16:26, ToughButterCup said: Ok, quick email to the manufacturer then: along the lines , 'Please reassure me that previous similar installations have been acceptable to Building Control' I've checked with building control and they are fine with it. Link to comment Share on other sites More sharing options...
Ivan_England Posted June 13, 2020 Author Share Posted June 13, 2020 21 hours ago, PeterW said: Rainwater overflow can’t go into your soil / sewer without permission - it has to go to soakaway. We are in clay so a soakaway isn't possible. Thames Water said they were fine with it. Link to comment Share on other sites More sharing options...
joe90 Posted June 13, 2020 Share Posted June 13, 2020 1 minute ago, Ivan_England said: We are in clay so a soakaway isn't possible. and me, BC agreed piped into ditch which would deal with local rainwater anyway . Link to comment Share on other sites More sharing options...
Ivan_England Posted June 13, 2020 Author Share Posted June 13, 2020 1 minute ago, joe90 said: and me, BC agreed piped into ditch which would deal with local rainwater anyway . Yeah seemed to be fine. I don't think we needed the tank in the first place, I could have put the whole feed straight into the combined drain, but I didn't want to get a larger pump going into the sewer the other end. Hence the reason for getting the tank. Link to comment Share on other sites More sharing options...
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