soil stack under kitchen floor for cloakroom toilet Help Needed

[DIYbuild]

Hi all I was to install a small cloakroom toilet (Toilet and sink in one unit)

From the toilet to the wall is 1.3m

and I have marked where it would come out as planned and where the finished floor is on the external wall.

i know the fall won't need to be a lot in the 1.3m but I'm unsure how to connect it into the soil stack when it gets outside as it will be on the bend that is already there and cemented in

any help would be greatly appreciated

 

[Exedon]

Your never going to get that connected to existing stack as it is.
Afraid that's expose drain and see what's happening beyond that 135° bend which needs replacing anyway.

 

[DIYbuild]

Thanks Exedon

so If I was to dig out the 135° bend and replace it could I then connect into the 135° bend, not sure if they make 135° bends with a connector

 

[Exedon]

Your almost certainly going to have to go further back to get a junction of some sort in
Expose drain and take further pictures?

 

[DIYbuild]

perfect thanks mate

I will get it all exposed and take some photos
I could deffo move the toilet to the opposite end of the cloakroom which would move it down by up to a metre away from the original stack.

 

[DIYbuild]

a bit more exposed

 

[Madrab]

How tall is that vertical stack? There's very little you can do at that point really as it does need that rest bend where the pipe turns horizontal.

The other problem you may have with that would be there is a min of 450mm required from the lowest connection to the stack and the bottom of the rest bend and you wouldn't have that the way it is at the moment.

 

[DIYbuild]

just had a plumber come out and he mentioned about swapping the bed to a 135 degree T and then going into a 90 straight into the wall

said it would be £1200 and that's with me digging the internal trench and knocking through the wall

found some markings on the wall from old owner and it says water trap inlet for sewer. No idea what this is if it's useful or will cause a problem.

I don't fancy paying 1200 out especially if like you mention MadRab there won't be enough height anyway.

not at home at the min but will measure when I get back.

would a saniflo be able to be installed or would that not make a difference. Mainly only going to be used for numbers 1.

 

[Nige F]

How tall is that vertical stack? There's very little you can do at that point really as it does need that rest bend where the pipe turns horizontal.

The other problem you may have with that would be there is a min of 450mm required from the lowest connection to the stack and the bottom of the rest bend and you wouldn't have that the way it is at the moment.

If there is another wc into the stack on a floor above, you have a Single Stack and the 450 is to stop a higher discharge interfering with the lower wc connection . If no connections I would argue against it with B.C

 

[DIYbuild]

If there is another wc into the stack on a floor above, you have a Single Stack and the 450 is to stop a higher discharge interfering with the lower wc connection . If no connections I would argue against it with B.C

Hi mate

there is a toilet the level above

I'm a complete novice here, am I right in assuming you and MadRab are saying there needs to be a minimum of 450mm between the bottom of the bend and the bottom of the new pipe connecting into the stack?

if that's so I don't think it's going to work with a standard toilet, would I be able to fit a saniflo - would the pump be able to push up the increased gradient

 

[Madrab]

If there is another wc into the stack on a floor above, you have a Single Stack and the 450 is to stop a higher discharge interfering with the lower wc connection . If no connections I would argue against it with B.C

Completely agree and if it was just a dry vent then there would probably be no need for a rest bend and the 450mm would have been moot but given it's configuration the presumption was it was wet, servicing a bathroom on a first floor, hence the question.

just had a plumber come out and he mentioned about swapping the bed to a 135 degree T and then going into a 90 straight into the wall

Obviously doesn't have a clue about standards nor the regs - or just doesn't care.

Macerators - brrr - gives me the willy's - you really want to avoid them if at all possible, terrible things. It would be able to pump vertically yes - some are up to 5m I believe.

Looks like an old clay trapped gulley minus it's grate.

 

[Hugh Jaleak]

That pipework is very shallow, where does it run to from there, any idea?

 

[DIYbuild]

Completely agree and if it was just a dry vent then there would probably be no need for a rest bend and the 450mm would have been moot but given it's configuration the presumption was it was wet, servicing a bathroom on a first floor, hence the question.


Obviously doesn't have a clue about standards nor the regs - or just doesn't care.

Macerators - brrr - gives me the willy's - you really want to avoid them if at all possible, terrible things. It would be able to pump vertically yes - some are up to 5m I believe.

Looks like an old clay trapped gulley minus it's grate.

thanks mate yeah I'm doing an extension ATM so anything I do will have to be signed off by BC as well so don't won't to pay silly amounts for something that's not to regs.

I know they do say it's a nightmare with macerators but struggling to see what I could do with this part and I've I can have it going up and through a false ceiling I should be able to solve the issue outside and still get to everything if **** hits the fan / Blocks the pipe

 

[DIYbuild]

That pipework is very shallow, where does it run to from there, any idea?

hi mate it runs to the chamber we have in the alleyway about 3 meters away it does drop quite bit once it hits the chamber

 

[cdbe]

Just do a bit more digging, that plastic is probably higher than the original pipe and in any case you can connect lower downstream if necessary.