Bathroom waste run?

[Super_Paulie]

im looking at potential layouts for my small, 2.2m x 2.xm bathroom. Before i offer up any designs to the missus, would a run of the 110mm waste like this be ok? im not 100% on this, but if i can move the bog to under the window then i will. It just means i guess 3x bends to get to the stack, which is all internal and the horizontal is around 2m. No access to any outside wall or underneath. 

 

Any thoughts guys?

 

Edited yesterday at 12:15 by Super_Paulie

[Nickfromwales]

1 hour ago, Super_Paulie said:

im looking at potential layouts for my small, 2.2m x 2.xm bathroom. Before i offer up any designs to the missus, would a run of the 110mm waste like this be ok? im not 100% on this, but if i can move the bog to under the window then i will. It just means i guess 3x bends to get to the stack, which is all internal and the horizontal is around 2m. No access to any outside wall or underneath. 

 

Any thoughts guys?

 

Perfectly acceptable. Carry on.

 

Run 50mm waste for the shower for that distance, and 40mm for the basin; reduce that to 32mm on the outlet of the last 40mm bend. Discharge will be much better than using 32mm to the basin from the stack 👌

[Super_Paulie]

33 minutes ago, Nickfromwales said:

Perfectly acceptable. Carry on.

 

Run 50mm waste for the shower for that distance, and 40mm for the basin; reduce that to 32mm on the outlet of the last 40mm bend. Discharge will be much better than using 32mm to the basin from the stack 👌

good man and good news.

One issue ive got, the stack. To be able to add in the addition lower connection for the shower id have to cut off the socket. The rest of the soil past joist level is already in-situ and i simply cant get to it without major surgery, i can only see the very top before the branch. If i cut off the female socket, remove 4 inches of pipe, whats my best option to add in the first branch to the stack? Solvent weld-to-socket? Female-to-female branch? Anything "on the outside" of the pipe seems a risk.

 

This is the current setup, socket on soil then the branch.
Second image is what i need to achieve. 

 

Edited 23 hours ago by Super_Paulie

[kandgmitchell]

How deep are those joists - just thinking about you cutting a 50mm waste with a fall across them

[Super_Paulie]

4 minutes ago, kandgmitchell said:

How deep are those joists - just thinking about you cutting a 50mm waste with a fall across them

An option is a raised tray and once i get to the left hand wall there is maybe 80mm gap between the brick and the first joist so im good once im there.

The joists are 170mm. Ive levelled them as the house sunk onto the beam when the house became open plan, with 20mm timber down at that end fading to 0 at the opposite end. Plus 22mm chipboard and 6mm ply. I was planning on notching all of the above which will give me roughly 70mm to play with if i run the waste close to the outside wall i dont need the subfloor covering as that wall will be studded out anyways. A raised tray is not out the question for me though, havent looked into it yet. Just at rough planning here.

[Nickfromwales]

6 hours ago, Super_Paulie said:

good man and good news.

One issue ive got, the stack. To be able to add in the addition lower connection for the shower id have to cut off the socket. The rest of the soil past joist level is already in-situ and i simply cant get to it without major surgery, i can only see the very top before the branch. If i cut off the female socket, remove 4 inches of pipe, whats my best option to add in the first branch to the stack? Solvent weld-to-socket? Female-to-female branch? Anything "on the outside" of the pipe seems a risk.

 

This is the current setup, socket on soil then the branch.
Second image is what i need to achieve. 

 

Something like this?

 

https://www.screwfix.com/p/floplast-push-fit-3-boss-single-socket-pipe-grey-110mm/18246?msclkid=842481fd35ec11702792ebfa4ba05dd8&utm_source=bing&utm_medium=cpc&utm_campaign=Bing_UK_Shopping_PMax_Heating %26 Plumbing&utm_term=2331720565763883&utm_content=Heating %26 Plumbing&gclid=842481fd35ec11702792ebfa4ba05dd8&gclsrc=3p.ds&gad_source=7&gad_campaignid=22478593832

[Nickfromwales]

Or this...

 

https://www.screwfix.com/p/floplast-solvent-weld-3-boss-double-socket-short-pipe-grey-110mm/17138

 

....if you need to glue it and push it down from above.

[Super_Paulie]

33 minutes ago, Nickfromwales said:

Or this...

 

https://www.screwfix.com/p/floplast-solvent-weld-3-boss-double-socket-short-pipe-grey-110mm/17138

 

....if you need to glue it and push it down from above.

 

It's more the cutting off the socket on the stack and then how to convert that "back into" a socket really, not sure if trust myself with a branch welded on incase I need to adjust the direction slightly. Would you recommend a solvent weld-to-socket? 

 

https://www.screwfix.com/p/floplast-push-fit-solvent-weld-single-socket-pipe-coupler-grey-110mm/13738

[Nickfromwales]

28 minutes ago, Super_Paulie said:

 

It's more the cutting off the socket on the stack and then how to convert that "back into" a socket really, not sure if trust myself with a branch welded on incase I need to adjust the direction slightly. Would you recommend a solvent weld-to-socket? 

 

https://www.screwfix.com/p/floplast-push-fit-solvent-weld-single-socket-pipe-coupler-grey-110mm/13738

Yup. Or just a regular double socket connector needing zero glue? 

[Super_Paulie]

13 minutes ago, Nickfromwales said:

Yup. Or just a regular double socket connector needing zero glue? 

 

Do you trust them? Seemed like not having the socket around the outside of the bottom of the branch is asking for leaks.

[Nickfromwales]

56 minutes ago, Super_Paulie said:

 

Do you trust them? Seemed like not having the socket around the outside of the bottom of the branch is asking for leaks.

Eh? These are bomb and bullet-proof! I've been using (therefore trusting) them for nearly 35 year  

 

You are perfectly fine using the 'push-fit' 110mm stuff, so relax a bit  Gives you a bit of flexibility and wiggle-room vs the concrete solidness, and lack of forgiveness, of solvent weld. 

[Super_Paulie]

30 minutes ago, Nickfromwales said:

Eh? These are bomb and bullet-proof! I've been using (therefore trusting) them for nearly 35 year  

 

You are perfectly fine using the 'push-fit' 110mm stuff, so relax a bit  Gives you a bit of flexibility and wiggle-room vs the concrete solidness, and lack of forgiveness, of solvent weld. 

 

I've only ever built stacks with the sockets at the top of the branches/pipe, one on top of the other (photo on the left). Never used a branch with the socket at the bottom as well, going "over" the stack as on the right in the picture. How trustworthy is the seal on the one on the right, as that's the situation I'll be in once I cut the socket off the soil pipe to reduce it.

Edited 14 hours ago by Super_Paulie

[dpmiller]

If you're really worried about the joint facing the "wrong" way you could always convert with

 

https://www.ebay.co.uk/itm/116518332919

[Nickfromwales]

37 minutes ago, dpmiller said:

If you're really worried about the joint facing the "wrong" way you could always convert with

 

https://www.ebay.co.uk/itm/116518332919

That’s quite a choke point, as the internal diameter reduces significantly with those converters. I only ever use those if the stack is cast and I can’t replace it for whatever reason.

 

These fittings are very reliable, assuming the pipe has been chamfered and the rubber seal lubricated correctly, and won’t give you any trouble.
 

If @Super_Paulie is in this amount of turmoil, simply use the solvent weld single socket one linked above, and sleep well.

 

FYI, I have used socket fittings inside residences for decades, zero failures.   “Chill”. 👍👌

[Super_Paulie]

2 hours ago, Nickfromwales said:

That’s quite a choke point, as the internal diameter reduces significantly with those converters. I only ever use those if the stack is cast and I can’t replace it for whatever reason.

 

These fittings are very reliable, assuming the pipe has been chamfered and the rubber seal lubricated correctly, and won’t give you any trouble.
 

If @Super_Paulie is in this amount of turmoil, simply use the solvent weld single socket one linked above, and sleep well.

 

FYI, I have used socket fittings inside residences for decades, zero failures.   “Chill”. 👍👌

 

theres no doubt about it, im a worrier and always need positive reinforcement on tasks. Thats why this forum has been an absolute gem of a find during my refurb.

 

Looking at it, the very short stubby solvent weld boss might be the best way to go as its lower than any push fit i can find, that will help with my fall. That means i'll have a weld section on the top as well so id need either a joining piece of straight and then a triple socket boss or even better a socket welded in then i can go with the "normal" push fit boss, could even use the socket i need to cut off the pipe i have in-situ. Not sure why im overthinking this...

 

 

[Nestor]

Not an "expert" but have done exactly this in an outbuilding with shower, WC and sink with an AAV added.

Like your drawings, what application are you using? 

 

[Super_Paulie]

20 minutes ago, Nestor said:

Not an "expert" but have done exactly this in an outbuilding with shower, WC and sink with an AAV added.

Like your drawings, what application are you using? 

 

 

SketchUp for the 3D stuff, Illustrator for the flat drawings. I'm the kind of person that needs to draw things up before my brain lets me do any of the work.

[Nickfromwales]

2 hours ago, Super_Paulie said:

Not sure why im overthinking this.

It’s what we do. 

[Super_Paulie]

Also just clicked on there are no real rodding opportunities. Take my chances, eat less protein and shave my head?

Edited 1 hour ago by Super_Paulie

[Nickfromwales]

9 minutes ago, Super_Paulie said:

Also just clicked on there are no real rodding opportunities. Take my chances, eat less protein and shave my head?

[Super_Paulie]

Hmm, the access to the other side of the branch will be internal, boxed in within a wall. Could always make an access panel I guess, probably better safe than sorry. 

 

2x45 instead of 90s might help as well if I have the room.

[Nestor]

20 minutes ago, Super_Paulie said:

 

SketchUp for the 3D stuff, Illustrator for the flat drawings. I'm the kind of person that needs to draw things up before my brain lets me do any of the work.

Thanks, I used SketchUp (excellent) for my build just not renewed subscription. Looking for a simple 2D app now.

 

Make an access panel if possible.

[Nickfromwales]

4 minutes ago, Super_Paulie said:

Hmm, the access to the other side of the branch will be internal, boxed in within a wall. Could always make an access panel I guess, probably better safe than sorry. 

 

2x45 instead of 90s might help as well if I have the room.

These things just don’t block; the flush velocity for the first 3-5m of pipe run is quite suffice to shift U571 along to its final destination. 

[-rick-]

6 minutes ago, Nestor said:

Thanks, I used SketchUp (excellent) for my build just not renewed subscription. Looking for a simple 2D app now.

 

You can still download* the standalone, local install and free version of Sketchup. Sketchup Make 2017.

 

* They've taken it off the main sketchup site I think but it's available elsewhere

Edited 48 minutes ago by -rick-