Ask Experts Questions for FREE Help !
Ask
    Josh_D's Avatar
    Josh_D Posts: 1, Reputation: 1
    New Member
     
    #1

    Feb 2, 2011, 04:46 AM
    Connecting PVC Drain Pipe to Cast Iron At The Joint, not in line
    I've been able to find lots of websites and forums that show how to connect cast iron to pvc in a straight section of pipe, but my cast iron pipes are rusting out right at a pipe union, where a straight pipe connecting into a large pipe in a Y fitting. The fitting Y section seems OK, but the straight pipe is crumbling. Is it possible to fit PVC into the iron Y piece, or do I need to replace the Y piece too and then connect that new PVC Y piece to the remaining cast iron lines some how?
    joypulv's Avatar
    joypulv Posts: 21,591, Reputation: 2941
    current pert
     
    #2

    Feb 2, 2011, 04:58 AM
    It's easiest and cheapest to replace all the cast iron back to where it first has crumbled, using a Fernco rubber/hose clamp to connect a straight section of PVC to a straight section of iron.
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
     
    #3

    Feb 2, 2011, 08:26 AM

    Cut out the section of pipe you want to replace but leave about 16 to 18" of pipe sticking out of the cast iron hub. Drill out the lead between the old cast iron pie and the hub. Use a drill bit a little smaller than the gap between the the pipe and the hub. Drill lots of holes all the way around the pipe. Lead drills easy and fast. Move or wiggle the pipe sticking out of the hub around. Pull up, down, back and forth. When the pipe is loose pull it out. Clean out hub. Get a gasket sized to fit in the hub and PVC pipe. Probably have to go to plumbing supply house fot that.
    Get a 10" length of PVC pipe with a hub. With a hub means PVC pipe with a hub on one end to accept another piece of pipe.

    Cut off the hub of the PVC with enough pipe to fit inside the cast iron hub. Sand and bevel the end to ease pushing inside gasket. Put gasket inside the cast iron hub. Grease both the inside of the gasket and the outside of the pipe. Push or press the PVC hub/pipe into the gasket. That won't be easy. Hitting won't help. Cut a length of pipe to replace what you cut out. Use glue to connect at the PVC hub and a shielded rubber clamp to connect to the old cast iron pipe.

Not your question? Ask your question View similar questions

 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Connecting pvc pipe to cast iron pipe [ 2 Answers ]

How can 3" PVC pipe be connected to 3" no hub cast iron pipe?

PVC to black drain cast iron pipe [ 3 Answers ]

Hi everyone, I would like to know what kind of adapters or other required parts are needed to connect my existing P trap under my sink to the existing cast iron drain pipe. Thanks, Bill

PVC or Cast Iron Drain Pipe [ 2 Answers ]

My Drain Pipe outside the house has been damaged severely by tree roots. Will it be better to replace it wit PVC or Cast Iron? What are the advantages and Disadvantages of using Cast Iron?

Connecting PVC Line to Cast Iron pipe [ 5 Answers ]

I am adding a second bathroom to an older 1-1/2 story house. I had planned to tie into the existing waste line. The existing toilet is on the first floor and discharges directly into a vertical cast iron pipe which appears to be 6 inches in diameter. This vertical pipe connects in the crawl space...


View more questions Search