Susie Posted July 18 Posted July 18 I’m planning in advance of the floor insulation and screed how I’m going to connect my shower waste and sink waste into the soil pipe. The shower is marked out bottom right of image and will connect diagonally across room to the soil waste pipe. The wall hung basin marked out with its waste either going across room also or through stud wall into the plant room where a washing machine will be and it can join the waste from the washing machine following perimeter of walls back into bathroom and to soil waste pipe. My options are then 2 or 3 connections into the waste pipe. I found this whilst searching for waste couplers anybody any thoughts on this or alternatives.
Oz07 Posted July 18 Posted July 18 Why is you waste pipe miles away from where it's needed? I'm not sure you can have 2 appliances into a single 40ish mm pipe? Building regs doc is pretty helpful. Check that out.
Susie Posted July 18 Author Posted July 18 The waste pipe is where the toilet will be. I was going to use 50mm pipe for the connections.
Oz07 Posted July 18 Posted July 18 Oh well you can't bring another up now but one near opposite corner or in stud / plant room behind would of been helpful. I think you are limited to how close connections can be on the horizontal level. Ie a branch connection has to be so far below a toilet waste. Check out the build regs doc it has these dimensions in
Spinny Posted July 18 Posted July 18 30 minutes ago, Susie said: I’m planning in advance So presumably this is a ground floor with a concrete slab ? If that back black wall is an outside wall I'd have thought consider digging up a piece of slab next to it to run a drain out through that wall. Maybe do this in the plant room/laundry room and then run the basin and shower waste through the stud wall and across to reach a new drain next to the black wall. You could dig out a channel in the slab and/or raise the shower tray to cover the shower waste pipe. It is a hard thing, there is so much detail, but the more that is planned in advance of a build the better, especially M&E. 1
Susie Posted July 18 Author Posted July 18 I have 180mm insulation to go down and 55mm of screed minimum so I have worked out the 1:40 slope will get to the drain in the insulation layer but not sure about the coupler that I need.
BotusBuild Posted July 18 Posted July 18 Susie, What about inserting a swept T in the existing soil pipe and then extending the soil pipe through the 180mm insulation following the red line in the edited photo. Then run your basin and shower waste following the approximated blue lines? Your waste pipes from the plant room could also come through the stud wall into this soil pipe of course. Then you can go down to 32 or 40mm waste pipe for each "appliance"
BotusBuild Posted July 19 Posted July 19 (edited) That soil pipe suggestion i made is daft @Susie. Start with the swept T but just do a straight line to somwhere close to the basin and the shower with no other bends. Doh, what was I on last night? A show, a basin and a washing machine into that manifold should be far enough away from the toilet pan. Probability of all three being used at the same time i would think is small(ish) so I would use one Edited July 19 by BotusBuild 1
Susie Posted July 19 Author Posted July 19 @BotusBuild so just checking I understand a swept T at existing then 110mm across to basin area then the shower, basin and plant room in 50mm to the 110mm But not the other way around all in 50mm coming together at the existing 110mm can you explain why? Thanks
Nickfromwales Posted July 19 Posted July 19 (edited) @Susie You need one of these as low on the 110mm pipe as is possible. And then use the solvent inserts to 50mm pvc pipe, not the rubber bungs that are on the ‘elephants foot’ you posted an image of. Then take a pair of 50mm pipes, one to shower one to where sink waste is, reducing at each item; you’ll want a 50mm bend facing up out of the floor, and then when above ground you reduce to 40mm, then the 90° bend before the basin trap would be a 40mm bend with a 40/32 reducer in to outlet, then a short piece of 32mm between the bend and the sink trap. Depending on what shower trap you have, you can either go straight on to their supplied adaptor, or reduce to 40mm immediate before the trap. No need for air admittance or ‘Durgo’ valves etc as the inverted are all <1300mm. 👍. Edited July 19 by Nickfromwales Solvent, not spent....stupid fat thumbs and an iPhone that makes shit up as it goes along.... 2
Nickfromwales Posted July 19 Posted July 19 One of the boss outlets is open, the other 2 are ‘blind’ so you need to drill the second one out 1
Temp Posted July 19 Posted July 19 +1 just check you can get a branch for the WC above it without it being too high.
Susie Posted July 19 Author Posted July 19 @Nickfromwales is that boss going at existing pipe? Perhaps should have said pipe is female coming out of slab with male just resting there for now. in which case is this what I get. I have the Impey linear 4 just arrived today and toilet and sink arriving Monday. Just so I can play around to get things dry fit, probably take me a month just to do the insulation in all rooms so plenty of time. Then box out all areas pipe will be and fit after the screed. thanks just noticed the <1300mm comment the shower waste to existing pipe is more like 2000mm.
BotusBuild Posted July 19 Posted July 19 Susie, Nick is right (as always) and I was on my way back to suggest same thing as that is what I ended up using as well. The push fit boss in your last post will do the same thing as what nick suggested. 1
G and J Posted July 19 Posted July 19 1 hour ago, Susie said: just noticed the <1300mm comment the shower waste to existing pipe is more like 2000mm So if a waste run is more than 1,300mm an AAV is required?
Nickfromwales Posted July 19 Posted July 19 26 minutes ago, G and J said: So if a waste run is more than 1,300mm an AAV is required? The invert, not length. An AAV is there to alleviate the vacuum caused by flushed water etc dropping vertically (more than 1300mm), cancelling out the air being sucked in behind it. The invert is the lowest point of the outlet of the WC pan, to the lowest point of the pipe it meets, when returning to a horizontal run. 1
Nickfromwales Posted July 19 Posted July 19 2 hours ago, Susie said: @Nickfromwales is that boss going at existing pipe? Perhaps should have said pipe is female coming out of slab with male just resting there for now. in which case is this what I get. I have the Impey linear 4 just arrived today and toilet and sink arriving Monday. Just so I can play around to get things dry fit, probably take me a month just to do the insulation in all rooms so plenty of time. Then box out all areas pipe will be and fit after the screed. thanks just noticed the <1300mm comment the shower waste to existing pipe is more like 2000mm. Yes, that fitting will do as long as stated the pan connector will go into it and be low enough to get onto the pan. Or, you just put that piece of pipe back in, cut it to leave 60mm of stub, and then glue on the one I posted. re 1300mm, see me last 1
Spinny Posted July 19 Posted July 19 Apols Susie, just couldn't see your makeup from the photo. Not seen studwork going down into the insulation layer before. 2
Nickfromwales Posted July 19 Posted July 19 3 hours ago, Spinny said: Apols Susie, just couldn't see your makeup from the photo. Not seen studwork going down into the insulation layer before. Defo not the norm, and usually on a kicker course of engineering bricks and Marmox breakers. I noted the low noggins, to catch the tail end of the plasterboards I assume(d), so thought they had this in check somehow.....we gotta pick our battles 1
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