Hi DIYnot!
So, I'm having to replace the bottom cast iron section of a previously unused soil stack which will be for the toilet and waste from the bathroom being installed upstairs. It was completely blocked from the clay pipe bend at the bottom, near enough all of the way up to the pvc pipe above - well over a metre worth of pure compacted rust inside.
There has been a possible good thing come out of it. Previously I had reluctantly decided to go the "easier" route for the downstairs WC to be installed, and use a macerator. I simply didn't want to remove the massive amount of concrete I expected to be in the way of attempting to cut low enough into the old cast iron pipe. But now the cast iron pipe is completely gone anyway, and the underground clay pipe does appear low enough to have the pvc soil stack immediately branch off for the downstairs WC.
The only problem is because I need the soil stack to branch immediately, I'm thinking I'll probably need a way of connecting a soil branch straight onto the clay pipe, with no straight section of pipe first... Does anyone know if this would even be possible?
Also the clay pipe bend remaining at the bottom does not have a clean cut... Is this going to cause a problem regardless, and what would be the best way to deal with it?
Here's a pic:
View media item 67555
I don't know how the cast iron pipe was connected or rather sealed with this originally, because it was already loose and only held in place by the concrete around it. I think the top of the clay pipe was already broken.
So, I'm having to replace the bottom cast iron section of a previously unused soil stack which will be for the toilet and waste from the bathroom being installed upstairs. It was completely blocked from the clay pipe bend at the bottom, near enough all of the way up to the pvc pipe above - well over a metre worth of pure compacted rust inside.
There has been a possible good thing come out of it. Previously I had reluctantly decided to go the "easier" route for the downstairs WC to be installed, and use a macerator. I simply didn't want to remove the massive amount of concrete I expected to be in the way of attempting to cut low enough into the old cast iron pipe. But now the cast iron pipe is completely gone anyway, and the underground clay pipe does appear low enough to have the pvc soil stack immediately branch off for the downstairs WC.
The only problem is because I need the soil stack to branch immediately, I'm thinking I'll probably need a way of connecting a soil branch straight onto the clay pipe, with no straight section of pipe first... Does anyone know if this would even be possible?
Also the clay pipe bend remaining at the bottom does not have a clean cut... Is this going to cause a problem regardless, and what would be the best way to deal with it?
Here's a pic:
View media item 67555
I don't know how the cast iron pipe was connected or rather sealed with this originally, because it was already loose and only held in place by the concrete around it. I think the top of the clay pipe was already broken.