Cast iron soil pipe

[ladwey]

I'm putting in a new ground floor bathroom and will need to run a waste pipe out for the toilet. The soil pipe outside is cast iron and goes all the way up to the roof. Is it possible to remove a section of it so I can splice in a PVC waste tee, rather than removing the whole thing and replacing with plastic? My worry is that it's not being supported only by the brackets that hole it to the house, so there will be a lot of downward weight if I cut into it. Could I somehow support it in place while I make the cuts?

 

[noseall]

I'm putting in a new ground floor bathroom and will need to run a waste pipe out for the toilet. The soil pipe outside is cast iron and goes all the way up to the roof. Is it possible to remove a section of it so I can splice in a PVC waste tee, rather than removing the whole thing and replacing with plastic? My worry is that it's not being supported only by the brackets that hole it to the house, so there will be a lot of downward weight if I cut into it. Could I somehow support it in place while I make the cuts?

It's possible yes, but faffy and not for the feint hearted. And it will look ugly too (Fernco couplers each side etc).
You may need to add more brackets to the SVP prior to cutting.

How do you propose cutting it? Even with additional brackets there can be a wee bit of downward shift, thus causing say a grinder to snatch.

 

[catlad]

You can hire cast iron pipe cutters, a lot safer than using a grinder.

 

[mrrusty]

Rent a scaff tower and drop it. There is no other sensible/safe option. No way would I be cutting out a section of cast iron soil - you're gambling that the fixings above are good enough to support the now unsupported stack, when in reality they are quite possibly corroded.... Cast iron soil is F'in heavy....

 

[bearC]

Disregard. I think it was the shower pipe not the soil

 

[ladwey]

Rent a scaff tower and drop it. There is no other sensible/safe option. No way would I be cutting out a section of cast iron soil - you're gambling that the fixings above are good enough to support the now unsupported stack, when in reality they are quite possibly corroded.... Cast iron soil is F'in heavy....

It looks brutally heavy, it's true. I'm sure I know your answer to this but is there any chance it would work for me to head up on a ladder and and install some more fixings along the length of it? I live somewhere pretty remote and getting a scaffold out there is going to be a huge pain. Obviously I won't cut corners, I'll do it if I have to, etc., but man I'd prefer to find an alternative.

 

[noseall]

It looks brutally heavy, it's true. I'm sure I know your answer to this but is there any chance it would work for me to head up on a ladder and and install some more fixings along the length of it? I live somewhere pretty remote and getting a scaffold out there is going to be a huge pain. Obviously I won't cut corners, I'll do it if I have to, etc., but man I'd prefer to find an alternative.

We tend to modernise whenever we come across old iron or azzy SVP’s. I would not work on one personally. We have removed quite a few using ladders and a crow bar. Some can be really stubborn and reluctant. It’s deffo not for the feint hearted.

 

[mrrusty]

We have removed quite a few using ladders and a crow bar

In the days before RAMS no doubt

 

[kp00110]

Builders fined after falling pipe hits five-year-old

Boy has skull fractured while passing housing site near primary school

www.constructionenquirer.com

Just 1 recent example of what can go wrong if you dont plan it properly