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connect to 4" Cast Iron
Author: DuklasJT (WI) What is the best way to connect to 4 " cast iron under a slab for toilet only? Are Fernco wye's under a slab within codes in WI?

Re: connect to 4" Cast Iron
Author: packy 2 band variety may be acceptable but i feel safer with the 4 band underground.

Re: connect to 4" Cast Iron
Author: hj as far as most plumbers are concerned, Fernco fittings are strictly a "temporary" DIY fix, and should NEVER be used underground or anywhere else they are inaccessible. And there is more to installing a toilet than just putting a "Y" in the pipe. Edited 1 times.

Re: connect to 4" Cast Iron
Author: DuklasJT (WI) So the 4 band wye connector would be the best in your opinion Packy?

Re: connect to 4" Cast Iron
Author: DuklasJT (WI) HJ thanks but I don't want to know what I can't or shouldn't do. I want to know the best way to connect to a 4" CI.

Re: connect to 4" Cast Iron
Author: waukeshaplumbing (WI) i use fernco's all the time underground...its a SS clamp....if it ever leaks a drop per hour who would ever know....they fit TIGHT and will hold.....i use a clampall for higher risk area's (inside walls), but for exposed areas and underground fernco's are all i use... i would use a PVC Y not a fernco y

Re: connect to 4" Cast Iron
Author: dlh (TX) ct's, fernco's as you all call them, are not good to use as they allow to much movement between the to pipe ends and thus have a huge potential to create "snag" points where used especially underground! ---------------------------- PLUMBERS "Protecting The Health Of The Nation"

Re: connect to 4" Cast Iron
Author: packy use a cast iron "Y". you will need.... a 4 x 3 no hub "Y" two 4" 4 band couplings one 3" 4 band coupling (transition from cast iron to plastic) the "Y" looks like this...

Re: connect to 4" Cast Iron
Author: LemonPlumber (FL) lead and oakum ---- Good Luck. Insulate your hot piping, although costly, it will pay you back every day.

Re: connect to 4" Cast Iron
Author: WilsonPlmg (OH) Like this but underground and use a 4X3 why ====================================================== Good Plumbing is not cheap and cheap Plumbing is not Good. Take the extra two minutes to do it right!!

Re: connect to 4" Cast Iron
Author: hj You use a cast iron fitting, "Y" combo or whichever one is best, and No-Hub couplings. I am sure that was one of the options you considered before looking at a Fernco rubber "Y". You do not need 4 band couplings, nor should you use all rubber Ferncos.

Re: connect to 4" Cast Iron
Author: hj I can guarantee you that if a "drop" can get out, a root WILL get in, and the definition of character is doing the right thing even if no one, such as an inspector, is watching you.

Re: connect to 4" Cast Iron
Author: hj Packy assumes he will use 3" for his toilet, and a cast iron fitting in your line would have looked "neater" and taken less space.

Re: connect to 4" Cast Iron
Author: hj And how is HE going to get it into the system. He wouldn't know how to "cock" it in, and he probably wouldn't be lucky enough to have a downstream hub to insert it into.

Re: connect to 4" Cast Iron
Author: packy that would not pass inspection in massachusetts. we must insert the same material into a pipe. cast iron into cast iron, copper into copper etc.. once the tee or wye is installed, we may then transition to any other material.

Re: connect to 4" Cast Iron
Author: dlh (TX) so whats the difference? ---------------------------- PLUMBERS "Protecting The Health Of The Nation"

Re: connect to 4" Cast Iron
Author: LemonPlumber (FL) dlh trans coupling use is also limited here.Although a fernco all rubber coupling is the use coupling,when going from metal to plastic tubing it may not be allowed to trans back. ---- Good Luck. Insulate your hot piping, although costly, it will pay you back every day.

Re: connect to 4" Cast Iron
Author: WilsonPlmg (OH) Just passed inspection today doing that. ====================================================== Good Plumbing is not cheap and cheap Plumbing is not Good. Take the extra two minutes to do it right!!

Re: connect to 4" Cast Iron
Author: dlh (TX) again, what difference does it make? imo there is no difference other than preference which has nothing to do with function ---------------------------- PLUMBERS "Protecting The Health Of The Nation"

Re: connect to 4" Cast Iron

Author: hj

Here, and most places, a transition coupling is the ONLY permitted way to connect different materials, and the all rubber "Fernco" coupling is NOT allowed anywhere inside the building, above or below ground. The inspectors prefer that the inserted fitting be the same material, that way they can insure that the i.d. surfaces line up and are not compromised by materials with different wall thicknesses.

Re: connect to 4" Cast Iron
Author: hj And sometimes a blind squirrel finds an acorn, but it depends on the inspector and how they interpret the code.

Re: connect to 4" Cast Iron
Author: hj It may have a lot to do with function. If the pipes have the same o.d., but different wall thicknesses, then the i.d. is going to create a "ridge" where the two pipes meet.

Re: connect to 4" Cast Iron
Author: dlh (TX) well that deserves a, DUH ! why would a plumber use pipe with different i.d.'s ? ---------------------------- PLUMBERS "Protecting The Health Of The Nation"

Re: connect to 4" Cast Iron
Author: hj Bercause that is the way they are made. Thin wall PVC has a larger i.d. than sch. 40, unless it is S&D in which case the i.d. is the same but the o.d. is smaller. Sch.80, also has a smaller i.d. than sch. 40, so mixing materials CAN cause changes in flow patterns. IF the plastic has a different i.d. than the cast iron there will be snag areas.

Re: connect to 4" Cast Iron
Author: dlh (TX) again, DUH! again, why would a plumber use a material with a different i.d. ? as you said, a different i.d. will create a snag area thus i, as a plumber, will use materials with compatible i.d.'s to make sure i dont have snag areas ---------------------------- PLUMBERS "Protecting The Health Of The Nation"

Re: connect to 4" Cast Iron
Author: LemonPlumber (FL) dlh.If you have wrinkle in a no hub band.It should fail inspection!Does it? ---- Good Luck. Insulate your hot piping, although costly, it will pay you back every day.

Re: connect to 4" Cast Iron
Author: dlh (TX) if the inspector catches it it will ---------------------------- PLUMBERS "Protecting The Health Of The Nation"

Re: connect to 4" Cast Iron
Author: hj And THAT is why the inspectors want the same material for the tie in fitting. Because THEY CANNOT see the inside of the pipe to detect if it was done properly. They know if you did not change materials, then there is no problem inside the pipe. And YOU are assuming ALL plumbers are competent and trustworthy.

Re: connect to 4" Cast Iron
Author: hj quote; if the inspector catches it it will HUH? Does that mean you WILL not change, or repair, it if the inspector misses it? You have just made my case. It won't happen with the proper fittings.

Re: connect to 4" Cast Iron
Author: dlh (TX) i have seen many crushed/deformed no hub bands used with no hub pipe so that means little to nothing and i dont take chances, if the band doesnt look good to me i will fix/replace it before i ever call for the inspection but there are others that wont ---------------------------- PLUMBERS "Protecting The Health Of The Nation"