JIH Posted August 7, 2016 Share Posted August 7, 2016 I'm looking for advice on what size of conduit I should put in my external wall to take the water pipes for my, yet to be purchased ASHP. I need to get this conduit installed before the insulation is blown but am unsure of how much room pipes plus lagging will require. Many thanks. Link to comment Share on other sites More sharing options...
IanR Posted August 7, 2016 Share Posted August 7, 2016 How are you insulating the feed and return pipes? Difficult if you're going to try and pull lagged pipes through a conduit I would have thought. You could use a pre-insulated twin 32mm pipes in a 150mm duct. I've got mine from Go Geothermal ltd. (for an under-slab routing) I believe it is a Rehau product. Link to comment Share on other sites More sharing options...
JIH Posted August 7, 2016 Author Share Posted August 7, 2016 Great idea, thanks Ian. Did you bend yours? Was wondering what sort of radius you can get with it. Link to comment Share on other sites More sharing options...
IanR Posted August 7, 2016 Share Posted August 7, 2016 It does need a fairly generous Bend Radii. I think I was told R600 Minimum when I asked the question, But i dug my trench deep enough for an R1000. Link to comment Share on other sites More sharing options...
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