I have a 2" galvanized pipe going into a cast iron fitting and the joint is badly corroded and leaking. See the attached picture. What are some options for fixing this joint? I was originally thinking of cleaning out the corrosion and packing it with epoxy plumbing putty - but I'm sure there are better approaches.

Thanks for the help.

Snowthrow- There is a way to repair your problem:: First WAy , You can cut the galv. Off about 1or2 ft. above rotted area, take a torch and heat the lead in the cast ,then remove the galv. Pieace. Then take a rubber boot that goes from the galv. To ( pvc) And replace the bad area with pcv. 2 and. Way cut galv. Above cast ,leave about 2" or 3 ". Cut about a foot or two off galv. Pipe and use ( 2 ) of the rubber boots and a piece of pvc ,cut to fit cut out arae. Hope IV'E helped. Good luck . F.B.E.

FBE, thanks for the reply. For your first suggestion, I would be removing the galv pipe from the cast and replacing it with PVC. But how do I seal the joint between the PVC and the cast iron fitting?

The 2nd way you've suggested I think leaves the galv pipe in the cast fitting. But it is that joint that is leaking and rusty. Maybe I misunderstood the 2nd suggestion?

Snowthrow- If you cut the galv. Pipe off ,and leave just enoughto put the rubber boot on and tighten down the metal clamp , enough to not have a leak. Bring the boot all way down to the cast iron. This is the easest and cheapest way to go . If you go the other way , (IT looks like a 1 Should fit tight1/2" galv. pipe , the pvc plastic 1 1/2". Should fit tight, use some silisone caulking around ,while it is clean and dry.::: IF I can help further come back here .;; YOU CAN GET THE PARTS YOU NEED AT Lowe's< HOME DEPOT< A PLUMBING STORE < SOME LUMBER YARDS. ( another way you may be able to reseal the leak { clean it off good ,then take a propane torch and melt the lead and try to get it to re seal around the galv. Pipe.} YOu Will need to tel them at the store what you are doing and about the boot , what you are going from and going to ::: F.B.E.

If it's the lead joint that's leaking you can recaulk the joint, cut the galvanized off, leaving a few inches, and convert to PVC using a Fernco Shielded Coupling,(see image). A rubber coupling wouldn't give you the support needed. ***or*** if the galvanized's too rotten near the joint cut the galvanized off and remove the lead joint by takeing a 3/8" drill bit and drill a few holes down past the lead and into the oakum.. Push a screwdriver under the lead ring and lever it up. Once it's free you can began to peel the lead ring out. Now pick out the oakum and you can pull the joint apart. Once the joint and piece of pipe's removed you can take a 2" DuelTite Gasket,(see image) and First clear and clean the cast iron hub. Then insert a 2" Duel-Tite Gasket, (see image) in the hub. Next take the piece of plastic pipe that you wish to convert to and file and bevel the sharp edges so it will slip into the gasket.
Next you will need Duel-Tite Lubricant to make the pipe slde in without friction. Apply the lubricant to both the pipe and the gasket. Now force the pipe into the gasket, KEEP IT SQUARE, do not cock it.
If you have a problem getting it started it's acceptable to take a razor knife and shave down the first few rows of ridges. You have just converted from cast iron to plastic. Good luck, Tom

FBE and speedball1 - thanks for the info. I'll dig into that joint to determine what I should do next. (I won't be reporting back for a while since I'm having some foundation work done too)