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I've got a quality home built in 1970 that has cast iron DWV (including all rain-drains). Most of the regular sink/laundry drains, which are easily accessible, are 2" cast iron (all held together with couplings that are easy to separate). I'm now finding some problems and am beginning to think that it would be just easier to swap out a significant main line (and 3 subs leading to it) with ABS and with regular clean-outs. Am I nuts? It wouldn't be a big job at all and I guess I'd be solving several issues at once. I'd leave the existing cast iron in the walls until those lines leave the floor into an area I can get to... and then I'd use some kind of Fernco coupling to switch to ABS. I'd have to eventually re-join a 4" cast iron sewer line (where there is a 2" to 4" Y).
Associated questions: 1) are there any issues with drain lines in unheated spaces that could freeze? 2) is a 2" line (existing size) adequate to collect a kitchen sink (with dishwasher), laundry sink and washing machine? Everything is vented OK.
Thanks
Associated questions: 1) are there any issues with drain lines in unheated spaces that could freeze? 2) is a 2" line (existing size) adequate to collect a kitchen sink (with dishwasher), laundry sink and washing machine? Everything is vented OK.
Thanks