I have two questions.
1. We are building a detached suite with full bath/kitchen etc. The main sewer is 3" ABS. this is plenty per code, however, the inspector has told me that it needs to change to 4" where it leaves the building. I'm just wondering if this is true where we are connecting the sewer to the main 4" line in the crawlspace of the house. I was thinking it would be fine to run a 3" line into the house and connect to the existing 4" main.
2. What is the best practice for connecting ABS (3 or 4") to the 4" cast iron? I've seen some adapters ideally I'd find a 3-4-4 wye where one the 3" wye is the new suite and the 4" is a clean out and the other 4" is an abs to cast iron adapter.. does this exist if I ask for it a plumbing supply? what is it actually called?
Thanks
1. We are building a detached suite with full bath/kitchen etc. The main sewer is 3" ABS. this is plenty per code, however, the inspector has told me that it needs to change to 4" where it leaves the building. I'm just wondering if this is true where we are connecting the sewer to the main 4" line in the crawlspace of the house. I was thinking it would be fine to run a 3" line into the house and connect to the existing 4" main.
2. What is the best practice for connecting ABS (3 or 4") to the 4" cast iron? I've seen some adapters ideally I'd find a 3-4-4 wye where one the 3" wye is the new suite and the 4" is a clean out and the other 4" is an abs to cast iron adapter.. does this exist if I ask for it a plumbing supply? what is it actually called?
Thanks