Triassic Posted June 14, 2017 Share Posted June 14, 2017 (edited) You can buy straight lengths of 110mm pipe without collars, might be easier to fit ! The collar then becomes a double collar and these can be bought separately. Regarding the route of the pipe. If it were me fitting the pipe I'd want to turn the Tee in the soil stack until the inlet points directly at the location of the new loo. How big a gap have you got between the two sets of joists? It may not be big enough to get the "correct" fall. You may have to compromise and just install the pipe with what ever fall you have! Edited June 14, 2017 by Triassic Added more info 1 Link to comment Share on other sites More sharing options...
Dee Posted June 14, 2017 Author Share Posted June 14, 2017 (edited) @Triassic. I'm not stressing over the joists /notching as they are not supporting the floor above. (Working from low up) The lower joists are only supporting the ceiling below, then there is a 100mm void, then new joists, then floor. Do DIYers really take notice of BRegs anyway?! ? I have an organic approach! I see what you mean with the T but if you look at the image where I'm stood way back my position is where the second loo will be, with another loo sited under the small window next to the stack. So at what point along the small section of exposed joists in the image would I notch /run the pipe? Left along the wall, center or right of centre? Edited June 14, 2017 by Dee Link to comment Share on other sites More sharing options...
PeterW Posted June 14, 2017 Share Posted June 14, 2017 @Dee can you sketch a quick floor plan ..? 1 Link to comment Share on other sites More sharing options...
Dee Posted June 14, 2017 Author Share Posted June 14, 2017 Link to comment Share on other sites More sharing options...
Nickfromwales Posted June 14, 2017 Share Posted June 14, 2017 Buy non socketed pipe lengths and fit couplers in the joist spaces. Notch the most nearest the stack and the least at the far end and you really don't need much fall at all tbh. I've run a 5m length from an ensuite previously and it had to lay flat, and I mean flat. Worked perfectly well just off the momentum of the flush and I could check as it ended in an inspection chamber. Biggest concern here is whether or not you can tee the 'middle' loo in with a Y branch and not a T branch. The flow of water from that one really needs to be directed so it doesn't stall in the pipe or split half left and half right. Link to comment Share on other sites More sharing options...
Nickfromwales Posted June 14, 2017 Share Posted June 14, 2017 2 minutes ago, Dee said: Bloody hell, that's a quick sketch 1 Link to comment Share on other sites More sharing options...
Dee Posted June 15, 2017 Author Share Posted June 15, 2017 (edited) I ll simplify my original question.... How do I connect a new poo pipe into the old stack/bend while retaining existing set up.... The new loo will be on the other end of the black pipe (out of shot) and the old loo will go back in it's original position.... See image (obviously I've just laid the black pipe on top of joists for context!) Edited June 15, 2017 by Dee Link to comment Share on other sites More sharing options...
Nickfromwales Posted June 15, 2017 Share Posted June 15, 2017 Are they both under the boards / in the void, or are they entering the soil pipe at different heights? Edit : will there be two separate connections to the vertical pipe, or one that tees for the first loo and then continues on to pick up the second one? So one run rather than two separate runs to each loo? Link to comment Share on other sites More sharing options...
le-cerveau Posted June 15, 2017 Share Posted June 15, 2017 (edited) I will defer to the experts, but the question is all about levels. Can you replace the branch (in the vertical stack) with a corner branch something like this: and then you have the two runs? Yes it means getting into the stack, but may be the easiest way. Edited June 15, 2017 by le-cerveau Picture failed to load Link to comment Share on other sites More sharing options...
Dee Posted June 15, 2017 Author Share Posted June 15, 2017 @Nickfromwalesyes, they are both under the boards in the same void. On your second point, I have no idea! What would you do? @le-cerveau... Your link dint come through Link to comment Share on other sites More sharing options...
le-cerveau Posted June 15, 2017 Share Posted June 15, 2017 @Dee edited with picture Link to comment Share on other sites More sharing options...
Dee Posted June 15, 2017 Author Share Posted June 15, 2017 @le-cerveaustill no image Link to comment Share on other sites More sharing options...
le-cerveau Posted June 15, 2017 Share Posted June 15, 2017 @DeeI see it when I log on Link to comment Share on other sites More sharing options...
Nickfromwales Posted June 15, 2017 Share Posted June 15, 2017 It was one of these @Dee Linky McLink 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted June 15, 2017 Share Posted June 15, 2017 @Dee Ill do a pic later . 1 Link to comment Share on other sites More sharing options...
Dee Posted June 16, 2017 Author Share Posted June 16, 2017 (edited) Would this work? The main issue is the stack is VERY tight into the corner! Edited June 16, 2017 by Dee Link to comment Share on other sites More sharing options...
PeterW Posted June 16, 2017 Share Posted June 16, 2017 Expensive way to fix an issue ... Use a tee on its side to go to the new pipe - a double socket would slip its "plain" end into the tee on the stack - and the just use a std 90 elbow to bring the other loo stack out of the floor. Quick, simple and 3 cheap components. 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted June 16, 2017 Share Posted June 16, 2017 Not ideal TBH as that creates the 'stall' I mentioned. I'll actually post a pic ASAP. 1 Link to comment Share on other sites More sharing options...
PeterW Posted June 16, 2017 Share Posted June 16, 2017 3 minutes ago, Nickfromwales said: Not ideal TBH as that creates the 'stall' I mentioned. I'll actually post a pic ASAP. Which one..?? 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted June 16, 2017 Share Posted June 16, 2017 Dees pic. 1 Link to comment Share on other sites More sharing options...
PeterW Posted June 16, 2017 Share Posted June 16, 2017 Ah - hence my comment ..! Flat tees and bends all the way for me ..! so get your wax crayons out and start drawing then ..!! 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted June 16, 2017 Share Posted June 16, 2017 8 minutes ago, PeterW said: Ah - hence my comment ..! Flat tees and bends all the way for me ..! Nope. Flat Y branch on a run with no fall 8 minutes ago, PeterW said: so get your wax crayons out and start drawing then ..!! I would have last night but my wife wasn't home and I'm not allowed the sharpener ? Link to comment Share on other sites More sharing options...
PeterW Posted June 16, 2017 Share Posted June 16, 2017 Fiiiigght ...!! Flat double socket Y into the tee on the stack, long radius bend into the Y for the closer bog .... Your turn next .... Link to comment Share on other sites More sharing options...
Nickfromwales Posted June 16, 2017 Share Posted June 16, 2017 38 minutes ago, PeterW said: Fiiiigght ...!! Flat double socket Y into the tee on the stack, long radius bend into the Y for the closer bog .... Your turn next .... That's better. I knew if you applied yourself properly you'd pull it out of the bag Its down to space and centres now though. A better option is cut the existing tee out of the vertical pipe and put the corner branch there. No need for any Y branches or flow management then, plus both pipes will be in the same void at the same level so 'hidden' until they rise vertically under the WC's. Link to comment Share on other sites More sharing options...
Dee Posted June 16, 2017 Author Share Posted June 16, 2017 (edited) I understand My 'method' was to avoid any unnecessary bends (which I assume is the ideal) cost isn't a factor here. The new poo pipe could then run straight from the corner socket straight to the new loo.......then I would know exactly where to notch the joists.....Plus the stack is very tight into the corner and I'm not sure I can get anything on or off it so I'm trying to utilise what is already there (Y joint ) Am I over thinking this ? I've, just got back from the builder yard with PB and battons to do the ceiling........i know where i am with ceilings Edited June 16, 2017 by Dee Link to comment Share on other sites More sharing options...
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