Whats the best way to transition from cast iron soil pipe to pvc? 4 in to 3 in.
Previously there was just a 4 in x 3 in flexible rubber coupling with 2 worm gear clamps on it, connected to a 3 inch L piece of 3 in PVC pipe(you still call this nipple? guess it could be eliminated with a street elbow) going to the elbow leading to the toilet.
Thats what I was going to do again, before reading about no hub couplings, soil pipe adapter and hub x no hub adapters, and also seeing universal pipe connectors like the SP140.
The transition will be above ground, but as said in the crawl space, its just like 6 inches of iron soil pipe sticking out of the ground, very shallow crawl space...I'd like to have the elbow coming off the soil pipe as low as possible for more slope flexibility, but its probably not a huge deal to be a bit higher if needed.
Also, theres a good bit of swollen(but still hard and intact) rust on the soil pipe, do I need to do anything about that? If so, how should I address it?
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Also, planned on putting a 3 x 3 x 2 elbow with low heel inlet on the soil pipe, the 3" inlet would obviously go to toilet, but on the 2" inlet I was going to attach either a 2x2x2x2 double san tee(unless a double fixture tee or double combination tee-wye would be more suitable??) with the right inlet leading to the tub/shower, and the left inlet leading to a branch serving the kitchen., with the straight up inlet leading to a double fixture tee serving a double vanity and AAV.
Does this sound good? Or would putting an all hub san tee with right and left inlets directly on the soil pipe make more sense? I kind of thought the toilet would be better served with its own elbow and everything else draining into it from above, don't know why just my gut....BUT, it might be necessary to get the kitchen branch sloped down a bit more than what an elbow with low heel inlet would allow....if necessary could I use a san with with left inlet hub, left inlet serving the kitchen but bathroom fixtures still draining in from above...or is there no reason not to use an all hub san tee with both right and left inlets straight on the soil pipe?
Another also....someone raised the concern to me that the 2" low heel inlet could act as a choke point if all fixtures were draining at once? And to maybe consider a 3" all hub san tee, with 3 x 3 x 2 x 2 double san tee? But my DFUs shouldn't exceed the limit of a 2" pipe, so thats not a problem right?
Any thoughts on this? I'm a horrible artist but I'll try to draw up a diagram tomorrow morning, thanks.
Previously there was just a 4 in x 3 in flexible rubber coupling with 2 worm gear clamps on it, connected to a 3 inch L piece of 3 in PVC pipe(you still call this nipple? guess it could be eliminated with a street elbow) going to the elbow leading to the toilet.
Thats what I was going to do again, before reading about no hub couplings, soil pipe adapter and hub x no hub adapters, and also seeing universal pipe connectors like the SP140.
The transition will be above ground, but as said in the crawl space, its just like 6 inches of iron soil pipe sticking out of the ground, very shallow crawl space...I'd like to have the elbow coming off the soil pipe as low as possible for more slope flexibility, but its probably not a huge deal to be a bit higher if needed.
Also, theres a good bit of swollen(but still hard and intact) rust on the soil pipe, do I need to do anything about that? If so, how should I address it?
----------------
Also, planned on putting a 3 x 3 x 2 elbow with low heel inlet on the soil pipe, the 3" inlet would obviously go to toilet, but on the 2" inlet I was going to attach either a 2x2x2x2 double san tee(unless a double fixture tee or double combination tee-wye would be more suitable??) with the right inlet leading to the tub/shower, and the left inlet leading to a branch serving the kitchen., with the straight up inlet leading to a double fixture tee serving a double vanity and AAV.
Does this sound good? Or would putting an all hub san tee with right and left inlets directly on the soil pipe make more sense? I kind of thought the toilet would be better served with its own elbow and everything else draining into it from above, don't know why just my gut....BUT, it might be necessary to get the kitchen branch sloped down a bit more than what an elbow with low heel inlet would allow....if necessary could I use a san with with left inlet hub, left inlet serving the kitchen but bathroom fixtures still draining in from above...or is there no reason not to use an all hub san tee with both right and left inlets straight on the soil pipe?
Another also....someone raised the concern to me that the 2" low heel inlet could act as a choke point if all fixtures were draining at once? And to maybe consider a 3" all hub san tee, with 3 x 3 x 2 x 2 double san tee? But my DFUs shouldn't exceed the limit of a 2" pipe, so thats not a problem right?
Any thoughts on this? I'm a horrible artist but I'll try to draw up a diagram tomorrow morning, thanks.
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