Thorfun

yeah, but that's underground drainage! and, yes, I know it's in a basement so technically is underground but I thought orange stuff was to be buried and grey/black was for internal.

ok. I'm pretty sure the boss is over 200mm below the WC branch but will measure in the morning.

I'm not sure if that's possible. here's the plans for the area where talking about. so the SVP in the drawing is pretty much where I've got it currently running. so I could double back on the run in the comms room in the basement, something like this side on drawing?

yes, and I did read them but don't remember seeing anything like that. I'll have another read.

if someone could post a link to Floplast push fit swept tees I'll use them! but I couldn't find anything by that name.

there is one in the plans. if it ever gets installed I'll use a saniflo to pump it up to the soil pipe in the plant room. somewhere along the run below.

not sure what you mean by this, sorry. the WC goes into the branch in this photo. the boss is just below the chipboard flooring for shower waste.

if I understand you correctly I think you're saying to put the branch on the horizontal and 90° in to it using 2 x 135° bends? if so, that would mean I would have to run the pipes on the other side of the wall and then bring it through that wall on the horizontal. but there's not a lot of space so it might not work! in the drawing below what I've got at the moment is on the left. is what you're proposing on the right? if so, I might have enough room to do that.

you're assuming I have a design! I have little space to run these soil pipes. I've come to the conclusion that our house was designed for aesthetics with not a lot of thought about how everything is going to put in. I have to run soil pipes around MVHR ducts, block and beam, posi-joists and lots of other obstacles that make it hard to do simple runs. hence the number of 135° bends to offset around obstacles. I'm not sure what you mean by wrong orientation though? I'm just trying to get s**t from the toilet branch to the soil pipe through the basement wall! we have 3 bathrooms that will go out through that single outlet.

actually, I can't seem to find any sort of 110mm soil pipe rest bend that isn't designated for underground use!

the long drop goes in to a 135° bend to offset a bit before hitting the branch. does that make a difference? also, I can't seem to find a Floplast push fit rest bend! and it's been previously suggested to pick a brand and stick to it, especially with push fit as sizes could differ. 😞

after much deliberating about the 90° access bend on the vertical and whether or not I should change it I decided to leave it alone. it got the thumbs up from @Nickfromwales and, eventually, got a 'should be ok' from @PeterW which is good enough for me! 😉 today I moved on to another bathroom which drops vertically to the comms room and joins the pipe going through the basement wall. I also managed to connect Monday/tuesday's work to it and it all seems to fit together ok so far and seems to be falling at correct levels! as usual, I am very open to comments both positive and negative. the branch for the loo. it will go vertical to the loft where I will fit an AAV. drops down with a boss fitting attached for the shower waste and maybe sink if I can't get the sink to boss above the branch above. down through the block and beam and in to the comms room. and out through the basement wall and the other pipework joining up. I'm happy with it and think it's correct! I know it all needs supporting but it was getting late so I'll do that tomorrow. ps. a quick tag for @pocster to critique so he doesn't feel left out.

fyi if you want to tag someone you need to precede their username with an @ symbol. eg. @pocster and @Moonshine. that way they should receive a notification that they've been tagged. otherwise, they could easily miss the post especially as pocster is probably busy buying walk on glazing.

ok. thanks. hopefully I'll never need to rod it any way! I'm still interested in a better solution though. always looking to improve myself and my knowledge.

@Nickfromwales so, even though you think my solution is ok, would something else be better? I have other options and can go for your 135° in to 135° branch if you think that is a better solution. I'd rather get it right now than have to do it all again at a later date. I've got pretty thick skin so don't worry about offending!

yep. here they are:

I can vouch for that! I took it apart and it is very smooth. I'll pop out and take a photo.

and, for future reference, when is an access elbow used if not on a drop? is it only on a horizontal? if so I could probably make that happen with what I've already got! I can go 135° into 135° from the vertical and then into the 90° elbow on the horizontal.

thanks for the feedback. it is very much appreciated. I can easily swap the 90° bend with access point for one without the access point! but I had a drawing from a civil engineer showing a similar access point in a 90° bend so was following that in a way. but I do now see it says long radius bend. I am confused by what the Red Cross is denoting though as that's MVHR ducting you've marked it on! even though I said I didn't want to change it I will if it will give a better solution! I think I understand what you mean about 'open end on horizontal having the cleaning/rodding eye'. do you mean one of these: https://www.drainagepipe.co.uk/ring-seal-soil-branch-135-degree-x-110mm-grey-p-SP210G/ with one of these in the end: https://www.drainagepipe.co.uk/ring-seal-soil-access-plug-110mm-grey-p-SP292G/ will that be a better access/rodding solution?

Insulated slab? 😂

but wouldn't the cost of a course of that lot around the perimeter be similar price to a truck load of EPS?! I had a few Foamglas blocks which I got from @ToughButterCup for a cheap price as he had them leftover. but to buy them new would've been eye-watering for the perimeter of a building.

today I also carried on this soil pipe to the basement where it will join up to the pipe going out of the wall and to our STP. I'm REALLY hoping that no one sees an issue with this work as I REALLY don't want to do it again! below photo is from the room above. it's not fugly but I had to skirt around the MVHR ducting and there was no other way of doing it. it looks good to me. 🙂 and for once I'm happy about it not being level! it falls approximately 25mm over 1500mm so roughly 1:60 fall which, I believe, is well within tolerance. I await the criticism!

all strapped up. hopefully it's now good enough to sign off! 😉

pvc coated strap band already here and ready to rock. will strap it all up a bit later.

SVP take 2. a LOT less fugly @Russell griffiths, @ProDave, @Nickfromwales. does this work better? I'm much happier with it! tbh, I wasn't really happy with the previous attempt and do agree it was fugly. it really didn't look right. thanks for keeping me on the straight and narrow.