web_surfer
New Member
As a long time reader I have gained a lot of information from this site. Now I have a question that will hopefully be answered. If it has been addressed elsewhere previously please let me know.
I am adding a cast iron 4" x 4" x 3" upright wye (new Charlotte Pipe) in the 4" vertical cast iron soil stack (approx 60 years old) that runs from the basement floor up through the second floor & then exits through roof. Other than being embedded in the basement concrete floor it was only supported by the pipe running through a 3/4" piece of wood that wrapped around underneath a hub on the first floor. I added a riser clamp on first & second floor. After measuring the the pipe & wye it is apparent that a 4" cast iron to 4" copper coupling is needed (thanks to Terry on this - picked up out of a reply on different thread). Intend on using Mission Rubber CK-44.
My question is how much should be cut out of the soil stack. If the wye is 8" then how much should be cut out? I notice that the couplings have 1/8"± ridge in the middle where the two pieces of pipe meet - so does that mean 8 1/4" cut out? Also, what about future settling on the 2½+ stories of pipe above it. I realize that the riser clamps should support the weight, but won't there still be some settling thus squeezing/pinching the middle ridges in the couplings?
I decided to use the cast iron wye instead of PVC because of concern of the weight that if there is any settling that PVC may not be able to support the settled weight.
Thanks,
Matt
I am adding a cast iron 4" x 4" x 3" upright wye (new Charlotte Pipe) in the 4" vertical cast iron soil stack (approx 60 years old) that runs from the basement floor up through the second floor & then exits through roof. Other than being embedded in the basement concrete floor it was only supported by the pipe running through a 3/4" piece of wood that wrapped around underneath a hub on the first floor. I added a riser clamp on first & second floor. After measuring the the pipe & wye it is apparent that a 4" cast iron to 4" copper coupling is needed (thanks to Terry on this - picked up out of a reply on different thread). Intend on using Mission Rubber CK-44.
My question is how much should be cut out of the soil stack. If the wye is 8" then how much should be cut out? I notice that the couplings have 1/8"± ridge in the middle where the two pieces of pipe meet - so does that mean 8 1/4" cut out? Also, what about future settling on the 2½+ stories of pipe above it. I realize that the riser clamps should support the weight, but won't there still be some settling thus squeezing/pinching the middle ridges in the couplings?
I decided to use the cast iron wye instead of PVC because of concern of the weight that if there is any settling that PVC may not be able to support the settled weight.
Thanks,
Matt