You don't, you remove the plastic junk and replace the toxic plasatic with cast iron
Cast Iron extra heavy, Cast Iron service weight, No Hub Cast Iron, Galvanized, Copper Tubing, PVC are the most common BUT plastic should not be exposed to direct sun light thus for the vent terminal CI or other Ferrous materials are desired
As far as I know PVC is illegal in New York and Chicago.
Definitely PVC
Depends on the type what means I use to replace it CAST Iron/ BRASS / Antimony / PVC / SCREWED TYPE
Answer replacing cast iron with PVCThere is a rubber sleeve available that goes in the cast iron and then the PVC slides into it. Use a rubber outside sleeve with two hose clamps. You can also replace the rusted section with PVC and them "lead" them with the packing and a paste sealant that is made for this.
The best way to connect a cast iron pipe to a PVC pipe using a cast iron to PVC adapter is to first clean and prepare the ends of both pipes, then apply a suitable adhesive or sealant to the adapter and securely attach it to both pipes according to the manufacturer's instructions.
Yes, but PVC creates problems
To connect PVC to cast iron pipes, you can use a rubber coupling with stainless steel clamps. Make sure the pipes are clean and dry before attaching the coupling. Tighten the clamps securely to create a watertight seal between the PVC and cast iron pipes.
If you are referring to your vent stack it will be on the roof, either 2" is smaller services and 4" is main line out of the house in either PVC or cast iron. If you are referring to your vent stack it will be on the roof, either 2" is smaller services and 4" is main line out of the house in either PVC or cast iron. If you are referring to your vent stack it will be on the roof, either 2" is smaller services and 4" is main line out of the house in either PVC or cast iron.
No PVC is acceptable, you can join the new PVC piping into the existing Cast Iron.
Pvc pipes are cheaper. They are easier to join. They last longer.