cast to pvc transition

Discussion in 'Toilet Forum discussions' started by buddyluv, Apr 7, 2005.

  1. buddyluv

    buddyluv New Member

    Apr 7, 2005
    i am remodeling a bathroom, first one, and the toilet is located 14" from wall and i want to relocate it to 12". the piping is all cast iron and am wondering if i can just cut pipe and use a coupling and use pvc form there to the toilet flange. the stack is located directly behind the wall behind the toilet. also the drain from the tub is located on the same horizontal run as the toilet. is it ok to have this setup or is it not code any more. the house is 90 plus years old. also how do you separate a cast iron joint?
  2. buddyluv

    buddyluv New Member

    Apr 7, 2005
    actually i am just wondering if i can cut the 4" cast toilet drain and use a fernco 4" to 3" rubber coupling and replace toilet flange and elbow and short horiz. run with 3" pvc, or do i have to remove cast from the stack joint then use a rubber donut? the floor loists are only 8" that is why i am using 3" not 4", the elbow is not tight enough. but the 3" fits with no floor height problems.
  3. Sponsor

    Sponsor Paid Advertisement

  4. RioHyde

    RioHyde Plumber

    Sep 24, 2004
    Cincinnati, Ohio
    You can cut the 4" cast iron and transition to 3" PVC. However, I wouldnt use a Fernco in this particular instance. Reason being is that locally Fernco rubber couplings arent allowed by code for above ground installations. It might be different in your part of the world. What I'd use is a PVC no hub adapter and a 4X3 no hub pipe coupling such as Mission's C 430 C. Either way should work fine though as you are within pipe size requirements for a toilet.

    Mission no hub coupling
Similar Threads: cast transition
Forum Title Date
Toilet Forum discussions Reuse or Replace Cracked Cast Iron Toilet Flange? Nov 3, 2017
Toilet Forum discussions Cast flange help Oct 5, 2017
Toilet Forum discussions Toilet bowl casting. Before I install is this normal? Oct 2, 2017
Toilet Forum discussions How to connect back outlet toilet to cast iron soil stack? Oct 22, 2016
Toilet Forum discussions Cast Iron Soil Pipe & ABS/PVC Offset Flange Sep 11, 2016

Share This Page