Smunderdog
New Member
I have a 1957 ranch with what I believe to be the original cast iron drain lines. When this was put in, why would they have used 4" pipe run vertically down from the toilets (only about 18" or so), then transitioned to 3" using a 4 x 3 elbow, then run the 3" to the 4" main line?
Why wouldn't they have just run 3" all the way from the toilet to the main and then transitioned to 4"?
Just curious more than anything...
Why wouldn't they have just run 3" all the way from the toilet to the main and then transitioned to 4"?
Just curious more than anything...