Hi there
I am planning for running a new waste line from the second story of my 1898 house to the crawlspace about 12 feet below. I will be running this through a stub wall which will give me a maximum diameter of about 3.5 inches. I have "as-built" architecture plans drawn up and will be applying for the requisite plumbing and building permits (I'm putting in a new bathroom).
So a few questions, the pipe will have to do something close to a 90 degree turn at the bottom of the 12 foot drop due to a major structual beam below the stub wall, and then extend about 20 feet to the soil stack. With a 1/4 over 4 inches drop, this works out to about 5 inches drop over the 20 feet span.
Q1. Is this angle too sharp? Would a long 90 degree span be sufficient?
Q2. Is the "new" cast iron pipe of an external diameter that can fit in this stubwall? Can I (should I) mix cast-iron for the drop pipe and then use ABS for the span (due to weight?)
Q3. Attached is a shot of my soil stack. Plan A is to cut the stack in the top span above the central Y, and put a new Y in in this place. Does this seem reasonable? Or due to the shortness of available pipe, should I chop the pipe lower and replace the whole shebang?
Q4. At the top of the pictured soil stack on the top floor is the Y tha went to the former toilet. I have since removed this but the Y and toilet mounting is still in place. How should I cap/dispose of this?
Thanks very much in advance
-Nick
I am planning for running a new waste line from the second story of my 1898 house to the crawlspace about 12 feet below. I will be running this through a stub wall which will give me a maximum diameter of about 3.5 inches. I have "as-built" architecture plans drawn up and will be applying for the requisite plumbing and building permits (I'm putting in a new bathroom).
So a few questions, the pipe will have to do something close to a 90 degree turn at the bottom of the 12 foot drop due to a major structual beam below the stub wall, and then extend about 20 feet to the soil stack. With a 1/4 over 4 inches drop, this works out to about 5 inches drop over the 20 feet span.
Q1. Is this angle too sharp? Would a long 90 degree span be sufficient?
Q2. Is the "new" cast iron pipe of an external diameter that can fit in this stubwall? Can I (should I) mix cast-iron for the drop pipe and then use ABS for the span (due to weight?)
Q3. Attached is a shot of my soil stack. Plan A is to cut the stack in the top span above the central Y, and put a new Y in in this place. Does this seem reasonable? Or due to the shortness of available pipe, should I chop the pipe lower and replace the whole shebang?
Q4. At the top of the pictured soil stack on the top floor is the Y tha went to the former toilet. I have since removed this but the Y and toilet mounting is still in place. How should I cap/dispose of this?
Thanks very much in advance
-Nick
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