How best to do this?

[Beau]

I'm putting in a new WC. I've drilled nearly a meter through the wall to get the 110mm waste out in the right place outside so I really don't want to move the soil pipe. It's a wall hung WC and we would like the stud It's mounted on to be around the line of the yellow level but it can go back or forwards a bit and the pan approximately where the hawk is. What I'm undecided on is how best to do the waste. My original plan was to have a 45 to get it to run parallel with the back wall and then a 90 to go to the back of the pan. Then I thought why not just have a 45 pan connector straight onto the pipe in the picture but I don't think I would have enough flexibility in a single joint as the natural angle is nearer 55 degrees. I'm presuming flexible connectors are just asking for trouble? 

 

What do you think?

 

Edited June 12 by Beau

[Jenki]

You can get single and double Adjustable bends that might help, also you can get tight 90 Deg bends if space becomes tight 

[marshian]

21 minutes ago, Jenki said:

You can get single and double Adjustable bends that might help, also you can get tight 90 Deg bends if space becomes tight 

 

I've used two of these in the past for an awkward soil pipe to pan angle - try to get one with ridges on the rings that lock up the joints as the smooth finish ones are much harder to get tight. (Flo Plast ones definately have that)

[Mr Punter]

I would just do it with a normal flexi.  I think rats are a consideration if this is ground or basement level though.

[Beau]

Thanks for the suggestions.

 

Just as I thought I had a plan I discovered that any fitting for 110mm pipe won't fit through the Gerberit Duo frame. It comes with a 90 and a straight connectors but seems angles are not an option. Probably going back to plan A and get the 110mm soil pipe parallel-ish with the wall and have a straight connector out the pan (which fits the frame) going to a 90 onto the 110 soil pipe. Hopefully there is enough wiggle room in all the those joints to line thing up properly. Picture attached 

 

"I think rats are a consideration if this is ground or basement level though."

 

Thanks for the warning. Its a working farm with loads of hollows in the rubble filled walls. There is a risk of rodents so a flexible connector now has an extra black mark by it haha 

 

Nothing's ever easy is it! 

Edited June 12 by Beau

[Nickfromwales]

You can use underground fittings which will give you 15° & 30° options, with both available as female / female or male / female (double or single socket).

 

Theres very little wiggle room with the frames so your stated favoured option is best tbh.

 

I assume you know the Geberit pan connector can be cut down in length? 

[Beau]

2 hours ago, Nickfromwales said:

You can use underground fittings which will give you 15° & 30° options, with both available as female / female or male / female (double or single socket).

 

Theres very little wiggle room with the frames so your stated favoured option is best tbh.

 

I assume you know the Geberit pan connector can be cut down in length? 

Thanks Nick

 

Yes, that's probably my only easy option. I did presume they were OK to cut down in length but dont want to mess with parts until I'm committed to a plan of attack. The 90 in the second picture is on 90mm pipe. Do you think it would be better to use that or swop to 110mm as soon as I'm through the Gerberit frame? I wondered if the extra flow through the smaller pipe so close to the pan might be beneficial at preventing blockages

[Nickfromwales]

12 hours ago, Beau said:

Thanks Nick

 

Yes, that's probably my only easy option. I did presume they were OK to cut down in length but dont want to mess with parts until I'm committed to a plan of attack. The 90 in the second picture is on 90mm pipe. Do you think it would be better to use that or swop to 110mm as soon as I'm through the Gerberit frame? I wondered if the extra flow through the smaller pipe so close to the pan might be beneficial at preventing blockages

There’s so much velocity at the outlet it doesn’t matter tbh, and you can still do a soil stack in 3” pipe if it only serves a single WC, no actually need for 4”.
 

4” just gives redundancy and is the knee jerk.

[Beau]

1 hour ago, Nickfromwales said:

There’s so much velocity at the outlet it doesn’t matter tbh, and you can still do a soil stack in 3” pipe if it only serves a single WC, no actually need for 4”.
 

4” just gives redundancy and is the knee jerk.

I didn't know that. Every days a school day as they say

 

Many thanks

[Alan Ambrose]

I think this puzzle over the exact way to solve particular connection constraints to loos is not uncommon. I’ve certainly been there before.

[G and J]

22 hours ago, Nickfromwales said:

There’s so much velocity at the outlet it doesn’t matter tbh, and you can still do a soil stack in 3” pipe if it only serves a single WC, no actually need for 4”.
 

4” just gives redundancy and is the knee jerk.

So if a friend of mine (not me, obviously, I never worry about anything) was laying awake at night thinking about how he’d get his poo pipes through his metal web joists to serve an upstairs potty, the connection from said potty could, if need be, be done in 82mm pipe till it hits the 110mm soil stack.  That run would only carry waste from my, I mean his potty.

 

I’m asking for a friend you see. 

[Beau]

3 hours ago, Alan Ambrose said:

I think this puzzle over the exact way to solve particular connection constraints to loos is not uncommon. I’ve certainly been there before.

Some more options on fixed angles would be nice but as was pointed out I could of used some of the other angles available in the brown 110mm.

 

I think in this case the problem is me being an amateur. A pro would have know what components were available. I have now found an ideal coupler to solve my problem. Also I have chosen not to use variable angle systems when they are probably fine so my cautiousness has hindered progress 

 

I'm going to have this on the back of the pan and then a 45 degree onto the 110mm waste. https://www.monsterplumb.co.uk/mcalpine-wc-con7-14-degree-angle-rigid-pan-connector-110mm?utm_source=google&utm_medium=cpc&utm_campaign=22385443807&utm_term=&gad_source=1&gad_campaignid=22375516008&gbraid=0AAAAADRbF0WMYsYZoKrYUagiN7GtkSFsm&gclid=Cj0KCQjwu7TCBhCYARIsAM_S3NgL8Y7mX1v5wu0edW-hPP_yfKCogYm_unyvPoeFMxfveUBoTGU-n0EaAum2EALw_wcB

[Nickfromwales]

10 hours ago, G and J said:

So if a friend of mine (not me, obviously, I never worry about anything) was laying awake at night thinking about how he’d get his poo pipes through his metal web joists to serve an upstairs potty, the connection from said potty could, if need be, be done in 82mm pipe till it hits the 110mm soil stack.  That run would only carry waste from my, I mean his potty.

 

I’m asking for a friend you see. 

What distance is there between the chords, inside your friends posi joists? 

[G and J]

1 hour ago, Nickfromwales said:

What distance is there between the chords, inside your friends posi joists? 

‘My friend’s posijoists are 253mm high.  The diagrams of them show that I, erm, he can easily get a 110 mm pipe through but exact routing and fall etc are a source of concern to the persistent worryguts.  
 

Thus knowing that there’s a slightly smaller bore option is comforting. 
 

 

[Nickfromwales]

1 hour ago, G and J said:

‘My friend’s posijoists are 253mm high.  The diagrams of them show that I, erm, he can easily get a 110 mm pipe through but exact routing and fall etc are a source of concern to the persistent worryguts.  
 

Thus knowing that there’s a slightly smaller bore option is comforting. 
 

 

What distance does the pipe need to run horizontally for?

[G and J]

2.5m, so roughly a 40mm fall.  I’m sure it’ll be fine.

[Beau]

2 hours ago, G and J said:

2.5m, so roughly a 40mm fall.  I’m sure it’ll be fine.

 Sounds perfect.

 

Think the range for fall is 1 in 40 max, 1 in 110 min so your right in the middle