How to connect back outlet toilet to cast iron soil stack?

[personage]

I have a back outlet, floor mount toilet that leaked behind the wall. When I removed drywall, I saw that the connection between cast iron soil stack and the plastic connector is leaking. Please see photos.

What is the proper way to connect the cast iron and plastic? Should I remove and replace the plastic connector, or leave it in place and seal it somehow. The plastic connector is threaded, but I doubt that cast iron has a thread. (I have not tried taking this connection apart.)

My other question is how to properly connect the toilet. A wax ring was used, but the toilet was leaking there as well. I have read that a wax ring is not suitable for rear discharge toilet.

Thank you for advice.

 

[hj]

You need something like a J R Smith #2 or #2M connection which is a screw on flange.

 

[Sponsor]

 

[personage]

You need something like a J R Smith #2 or #2M connection which is a screw on flange.

Thank you, that looks like exactly what I need. Where can I buy this? And what sealant do you recommend?

I have tried searching for ""Jay R Smith type 2 coupling"" but only found this brochure http://www.jrsmith.com/uploads/docs/eng.com7.13.pdf
http://www.jrsmith.com/uploads/docs/eng.com7.13.pdf
My other question is how to unscrew the leaking nipple. I have tried this strap wrench but could not move the nipple because the strap slips. Can you suggest a better approach?

https://www.menards.com/main/plumbi...lumbworks-11-strap-wrench/p-1444433583382.htm

 

[Reach4]

I am not a plumber or other pro.

http://www.jrsmith.com/water-closet-supports gives some part numbers you could search for, but I could not find a seller for one I picked at random.

I would think one (or two of these at the same time) could be good:

Big pipe wrench
VISE-GRIP Large Jaw Locking Pliers
VISE-GRIP Locking Chain Clamp

When using tapered threads, usually you want to use both Teflon tape and pipe dope such as Rectorseal T Plus 2 or #5.

 

[personage]

Thank you, I have tried the site but could not find a proper section. I'll look some more.

I'll check out a lock chain clamp, looks like it may do the trick.

I am not a plumber or other pro.

http://www.jrsmith.com/water-closet-supports gives some part numbers you could search for, but I could not find a seller for one I picked at random.

I would think one (or two of these at the same time) could be good:

Big pipe wrench
VISE-GRIP Large Jaw Locking Pliers
VISE-GRIP Locking Chain Clamp

When using tapered threads, usually you want to use both Teflon tape and pipe dope such as Rectorseal T Plus 2 or #5.

 

[hj]

J R Smith only sells to plumbing wholesalers so you have to contact them to see who in your area has access to them. You need a big pipe wrench because the nipple is often installed with Permatex, or something similar.

 

[personage]

Thank you. I could not find #2M online, but found this ABS nipple and coupling. Would these work for me?




0100N08P 4x8-1/4 ABS NIPPLE
https://www.zoro.com/jay-r-smith-mfg-co-nipple-4-in-x-8-14-in-0100n08p/i/G0700126/

0100C-P ABS ADJUSTING COUPLING
https://www.zoro.com/jay-r-smith-mfg-co-coupling-abs-plastic-0100c-p/i/G0700150/

0100GASKET-NEOP Neoprene Outlet Gasket
https://www.zoro.com/jay-r-smith-mfg-co-gasket-water-closet-0100gasket-neop/i/G6168662/

J R Smith only sells to plumbing wholesalers so you have to contact them to see who in your area has access to them. You need a big pipe wrench because the nipple is often installed with Permatex, or something similar.

 

[hj]

you need something with "lugs" for the bolts to attach to. The nipple with a floor flange glued to it would work.

 

[personage]

The cast iron piece has threads for the bolts. Would this be sufficient?

you need something with "lugs" for the bolts to attach to. The nipple with a floor flange glued to it would work.