Thorfun

I'll just add another one at the join nearest the rest bend and use strap band around the 'foot' at the base of the rest bend.

plastic. furthest shower that I care about is 10m away from the manifold.

👍. will get it sorted!

Right. So the force of the solids sliding down from above will force the bend off! Got it and not something I really want to happen. I’ll strap it up some more tomorrow and report back. thank you.

back to the plumbing manifolds. this is the design I've come up with. as there were no previous comments on the last design drawings I figured there weren't any major issues. it's a LOT of pipe! here's a photo of my plant room and where I was thinking of putting each manifold and the UVC. was going to put the hot manifolds against the wall and the cold ones sitting in front proud of the wall to save a bit of space (not that space is short in the plant room but I quite like the efficiency of the staggered manifolds like in this photo of someone else's setup taken from a thread on here. I have read many discussions on here about the size of pipe and have decided for simplicity to simply run 15mm everywhere and the HRC in 10mm. I know I could do the basins in 10mm but if I'm running an HRC to them then that will clear the dead leg and so I can use the 15mm without worrying about that side of it. anyone got any comments/suggestions/criticisms/plaudits before I purchase the plethora of manifolds and start running pipework!

so what's there now isn't sufficient?

hey, @Nickfromwales. can you please explain to me why you need to insulate an HRC but not a normal hot pipe? surely the point of an HRC is to replace the cool water with hot water when the hot tap is needed. so, assuming you have some form of occupation sensor and someone isn't spending 20 minutes on the loo then would the HRC/hot pipe really lose that much heat during the period of occupancy? or is there another specific reason for the lagging of the HRC/hot pipe combo?

Welcome. Not sure I can help too much. The last bathroom I renovated to allow my at the time girlfriend to move in ended up with us getting married. whether that was a good thing only time will tell. good luck with your project.

Thanks for the explanation. I’ll give it a trial when I can and take a photo to ask if I’ve done it how I understand it

I have plenty of the stuff! bought 20m of it previously so could easily use it instead of clips. but, don't clips hold pipe vertical as well as stopping it falling away from the wall, so how does the strap band do this?

then I pressure tested the whole system (already did each run individually and was all ok so wasn't expecting any issues) and it passed with flying colours. before: after 5 mins: testing at the manhole outside with all ok I fitted the AAVs on 2 of the stacks anyone notice any issues?

so I finished the internal 110mm soil pipes (mostly anyway, still go the en-suite above the garage to do). here's the 3rd run. starting in an en-suite down to the downstairs WC in to the basement where the rest bend takes it on the horizontal and I have a rodding point across a hallway to join up with the other 2 runs and out the basement wall all look ok?

what size insulation did you use? 9mm/13mm/25mm/something else? and did you use Climaflex as well?

is that so you don't have to cut the insulation around the clips? you can insulate the pipe and then strap band it to the wall?

Loxone will have that covered for me. 😊

Was going to use these clips. https://www.screwfix.com/p/talon-15mm-hinge-clip-white-100-pack/19684 so will pick some up and measure

if I did decide to insulate the colds then what size wall thickness of Armaflex would I be looking at? would it just be the 9mm to give basic insulation? or would a thicker wall be required?

I'm kind of thinking of taking the 'better safe than sorry' approach to my DIY plumbing!

that's interesting. I thought it was more likely to insulate the hots and not the colds! how would you know if there's going to be a chance of condensation though? is that experience or some mathematical calculation? I was planning on running 10mm HRC (that'll be a subject of another post after I've done the research) to the wash basins and sinks. I've read previous posts from you that say to run the hot and HRC in the same piece of insulation so that was what I was thinking of doing. so, I guess if I'm doing that for those then it's a small step to just insulating the whole damn lot?

another question.....pipe lagging with hep2o. is it really worth it in a well insulated airtight property? I'm aware that the first 1m or so from the UVC needs to be lagged and will be and my pipes from the ASHP to UVC will be lagged for their entire run but taps/sinks/showers/baths? ps. I know this subject has been done to death on here but, from my reading, there's still some fore and some against! what's a beginner to do if the experienced ones can't decide?

good luck. I look forward to following your progress

I'm sure that'll depend on what is deposited in it though.

for a man of your calibre, I'm sure it is. 😉

I'll probably need one of these if I ever install the loo in the basement. I'm very happy to let you be the guinea pig on this one!

does the pool not need some form of pump out? even if it does I guess it couldn't go into a foul water sump as that will just fill up your STP! when I started with the idea of a basement and got it approved and built I never thought it would complicate things so much. I really hope it's worth it! 😂