Thorfun

yeah, makes sense. and I guess that once I've run out of the excess 20mm electrical conduit I can get some 21.5mm overflow pipe. 🙂

qq on this subject. I have a lot of 20mm electrical conduit lying around. can I use that for 15mm pipe? according to this question on the SF page for it so that will give an 18.2mm ID. a bit tight for 15mm hep2o pipe or should it fit like a glove?

our civil engineer specified one of these for our foul water to all flow out of the basement and in to the sump and then pumped to the STP. when I looked in to costs for a 4m - 5m deep one at £5k I decided to ask them to design the foul water to use gravity and if we ever fit a toilet in the basement we'd use a saniflo! obviously a little different for you with a pool as I'm sure you'll have more need for foul/waste water to be dealt with in your basement.

I bring out the best in people.

My brother had a stroke at 46. Doctors said he was lucky to survive the night. But 6 years on and he’s driving but his right arm is still poor and the hand mostly stays in a fist. He also has Aphasia to top things off. But he says this is his second life and is pretty upbeat most of the time and is enjoying life in sunny Scotland. I wish you a speedy recovery and a long, happy and healthy second life! 🤘

ps. I have considered a hybrid version of two pipes to each room from a manifold and teeing off to each appliance from there. but, as you say, adds more in fittings even though it reduces pipe usage. but also adds joins which I'd like to get away from!

hopefully the house will be 'mostly' finished before we move in so won't really have a need day 1 to isolate, but the studio en-suite most likely won't be finished so will need to isolate that. I do love the idea of radial plumbing and the single point of isolation sounds great. just looking at those plans and looking at all those pipe runs it brought it all home as to actually how many pipes that is! which is why I was thinking for the his/hers sinks we could isolate the pair from the manifold to save running an extra 2 x pipes. but, I think I'll probably just run them anyway.

I presume you have planning permission? do you have building regs drawings? BCO will need (or at least did in my case) to see the SE calculations for the building. I suggest you spend the next 2 weeks trawling this forum on every possible subject and talk to the existing NI members who have done it all. if you can't get a mortgage on ICF then, rather than fighting the system, maybe pick a different build method? I can empathise with your need to get this going but maybe just take a step back and get some solid plans in place before digging more stuff up!

as I near the finish of the internal soil pipes (for now at least) my thoughts are now on the water pipes. I have decided to go with the radial manifold system. our toilets and washing machine will be supplied by a RWH header tank from the loft so they're not part of this plan but I am planning on putting a manifold in the loft to allow each toilet to be isolated individually if required. Below are some screenshots of what I think I need but I have a few questions (btw, ignore any pipe sizes you might be able to see, I just couldn't be bothered to remove them and the software I used ignored my request for metric sizes anyway!). In the master bedroom en-suite, we're having his and hers sinks. is it really worth having separate pipes for each sink or should I just run both of the same hot and cold? In the studio it is a small and rarely used en-suite and so I figure I might as well just run a single hot and cold feed and run both the shower and sink of that. madness or justified?. it's also quite a long distance from the plant room (15m - 20m or so) so I presume it'll need an HRC? Any of the other runs need an HRC? or should I just put one in regardless as it's a sensible thing to do even if our dead legs are minimal? In the kitchen we'll have a Quooker under the sink. I've just got the single cold feed for the kitchen sink and Quooker as I see no reason to have the Quooker on it's own feed especially as they're in the same location. is that sensible or should I run a dedicated feed for the Quooker? think that's it for questions for now. any other comments? Ground Floor First Floor Studio above garage

I agree with @Russell griffiths. get the insulated slab designed by an SE and then proceed from there. depending on what the SE comes up with will determine what you do for the foundations. I can recommend Tanner Structural Design for insulated slab design.

how is an overlooking issue a building regs requirement? sounds more like a planning requirement to me.

Flight Timber, who have now gone in to liquidation. which is a shame and someone on here has lost a lot of money and doesn't have a TF. 😞

MBC offer a guaranteed air tightness score of 0.6ACH with their passive twin wall iirc. If Airtightness is your thing then it should be a serious consideration. They even guarantee maximum 2ACH with a standard TF. I didn’t find many companies offering that. I still didn’t use them though. 😂

This is the solution I’d decided on and bought a rest bend when I was out earlier. I’m very glad to have it confirmed as the right thing to do! I’m not going to do the horizontal in 150mm though. I’ll stick with 110mm. I presume that’s fine? It’ll have to end up at 110mm anyway to join the other 2 branches. this, along with testing each of the 3 runs individually, is tomorrow’s job! I’ll update the thread with photos. 😊

I had a quote from Scandia-Haus and MBC. Scandia were stupidly expensive for the turnkey package. the quote was comprehensive so I could've dissected it and worked out just the TF etc but, as has been mentioned above, they use Actis insulation and my researched warned me against it (although at least one member on here has used it and are happy with it). MBC are expensive when compared to other TF companies but they do a twin wall pumped cellulose solution which, like @Iceverge, if I had my time over again I would go that route. but, as has been said above, take care putting too much emotional effort and money in to anything before you actually have planning permission! take a chill pill and do a lot more research on the options out there as there are many.

we used Proctor Roofshield with battens and counter battens so had a 50mm gap. but I believe the Roofshield can be used with a 25mm gap (drapped 10-15mm) but PLEASE ensure you check your specific situation with the manufacturer and your BCO as it might not be compatible for you.

tomorrow's job is dealing with this bend and the run to join up with the other soil pipes. I can't find a long radius bend with access so I was thinking of using a rest bend and then in to a 135° branch with an access point on the branch? the other option is a 45° bend in to a 135° branch with the access point plugged in to the branch? the third option is the 92.5° bend with access point built in that I've used before? which is the best way?

damn! where were you yesterday when I spent £10 on the other things that are due for delivery on Tuesday! 😉 think I'll pick up a couple of your solution as well as I have to pop to near Toolstation today anyway. thank you.

yeah, the 50mm one should do me I think.

lovely. thank you. the bosses on those are 60mm. should I get the 50mm ones or the 63mm ones? I presume the 50mm as it looks like they'll expand to fill up the 60mm hole?

I have those. I'm talking about plugging one of these https://www.screwfix.com/p/floplast-push-fit-3-boss-single-socket-boss-pipe-grey-110mm/18246

question time..... as I get ready to pressure test each section of pipe I'm wondering how I plug a solvent weld boss hole in a non-permanent way? I have bungs for the 110mm pipes and push fit caps but I can't obviously push-fit in to the solvent weld bosses. I'm wondering if there's a rubber bung like we all used to use in chemistry test tubes that'll do the job?

of course it is, I'm not that big a cowboy! 😉

thank you. ☺️ although sometimes it doesn't feel that way! consider it done.....well....on Sunday that is as tomorrow is a day off for me.

right! I've finished my homework @Nickfromwales. but it has thrown up another issue but I'll get to that in a bit. and with annotation in case it's not obvious does this work? and, the problem it has now brought up is the pipe coming from the other room in the basement doesn't line up with the second 135° branch now. so I've had to put two 15° bends before the 45° into the 135° branch to get it to line up. and from above is that ok to do that? or should I be drilling a new hole in the wall to get it to line up without bends?