cracked cast iron
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cracked cast iron (by Small potatoes [NY]) Sep 22, 2022 11:53 AM
       cracked cast iron (by Homer [TX]) Sep 22, 2022 12:46 PM
       cracked cast iron (by small potatoes [NY]) Sep 22, 2022 1:08 PM
       cracked cast iron (by Ken [NY]) Sep 22, 2022 2:03 PM
       cracked cast iron (by Ed [CA]) Sep 22, 2022 3:41 PM
       cracked cast iron (by Robert J [CA]) Sep 22, 2022 3:42 PM
       cracked cast iron (by MikeA [TX]) Sep 22, 2022 6:47 PM
       cracked cast iron (by small potatoes [NY]) Sep 22, 2022 10:00 PM
       cracked cast iron (by small potatoes [NY]) Sep 23, 2022 1:09 PM
       cracked cast iron (by Small potatoes [NY]) Sep 24, 2022 1:36 AM
       cracked cast iron (by zero [IN]) Sep 26, 2022 6:27 AM
       cracked cast iron (by Steve [MA]) Sep 26, 2022 6:30 AM

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cracked cast iron (by Small potatoes [NY]) Posted on: Sep 22, 2022 11:53 AM
Message:

what repair options do I have for patching cast iron crack that is 8" long. the bad piece is under the counertop, under the sink and the 4" pipe goes at an angle up behind backslash. I once used fiberglass impregnated tape that had to be activated and it was difficult. are there better products now? the pipe is at the end of its lifespan but gutting a kitchen wall to replace the 4" line is not on the menu. the line serves a laundry room with a toilet. under the sink all the pipe downstream is 10 years old and connected to the cracked pipe w collar and fernco. I thought of trying to slide another fernco up but there would still be a little gap between the two. I suppose I could wrap that joint. no good options,

--172.58.xxx.xxx




cracked cast iron (by Homer [TX]) Posted on: Sep 22, 2022 12:46 PM
Message:

Can you get to the crack and grind it to clean it up? If so, maybe JN weld? And on top

Of that, flex tape? Then the ferncos? --47.32.xxx.xxx




cracked cast iron (by small potatoes [NY]) Posted on: Sep 22, 2022 1:08 PM
Message:

not a grinder but maybe scratch it w a file. Problem I see is the epoxy would be lumpy and the fernco wouldn't slide over it. I have patched holes w 2 part epoxy , but not sure it will take well to a crack. maybe marine adhesive might work. --100.38.xx.xxx




cracked cast iron (by Ken [NY]) Posted on: Sep 22, 2022 2:03 PM
Message:

Could you cut a rubber fernco and get it in place and tighten it up good? might work. Back in the 70s my dad fixed one of those a long crack by wrapping it with duct tape,held for years --74.77.xx.xx




cracked cast iron (by Ed [CA]) Posted on: Sep 22, 2022 3:41 PM
Message:

braze it if you have room. --108.201.xx.xx




cracked cast iron (by Robert J [CA]) Posted on: Sep 22, 2022 3:42 PM
Message:

When I have a crack in a cast iron bathtub or sink, this is my quick temporary fix -- that can last a few years.

I first sand the damaged area. If the crack is deep, I will use my portable sand blaster to clean out the crack.

Then I will use some rust remover and chemically clean out the area.

Using a " 2 part Bondo Glass-Reinforced filler" I can fill small holes or cracks in metal.

Then I will sand it smooth using a good quality sand paper.

Then if the surface isn't smooth, I will go over the area with a "White Poly Filler (waterproof)", also a 2 part epoxy strong product.

Then I will sand it again to perfection. I can then either repaint the entire tub or sink. But in most cases I only paint over the area with an epoxy waterproof paint.

Of I can call a professional and pay out $175 to $400 for the repair and recoating(painting).

--47.156.xx.xx




cracked cast iron (by MikeA [TX]) Posted on: Sep 22, 2022 6:47 PM
Message:

Wire brush it and then get some caulk tubes of NP-1 and spread liberally on the pipe. It's in the rooing section not the caulk section of most big box stores. A little pricy but it is amazing stuff, epoxy based rubber caulk. I use it on the expansion joint in my swimming pool and it sticks and keeps it's flexibility for years even submerged in the pool with constant attack from chlorine. --209.205.xxx.xx




cracked cast iron (by small potatoes [NY]) Posted on: Sep 22, 2022 10:00 PM
Message:

so the whole pipe is cracked up close to the hub end, about 30" worth :( I'm afraid to try and remove the pipe to the hub on the elbow because that might deteriorate in the process, and then I'd be committed to an expensive repair and a kitchen reno. I am going to try and patch it w/ fiber mesh and product X. Worst comes to worst and it needs replacing which will involve removing a wall of backsplash for starters and that's if the street elbow and vertical run are sound.

MikeA, NP1 looks promising. Another option I am considering is 3M 5200 marine adhesive sealant. I think between ferncos, and adhesive caulk I have a chance. I used asphaltic caulk to pack a pvc to cast hub connection which has held several years, but don't think is the best choice here. --100.38.xx.xxx




cracked cast iron (by small potatoes [NY]) Posted on: Sep 23, 2022 1:09 PM
Message:

I had a fresh look at things this morning and decided the pipe was too far gone. The crack is really a 30" long gap and that's a lot to ask of a repair to hold together. It looks like there is 5" of solid pipe I can cut back to. Wish me luck. If more fails the counter and backsplash have to come off. And I'm going this myself because the plumber wouldn't try to be careful, they just destroy whatever is in their way. --100.38.xx.xxx




cracked cast iron (by Small potatoes [NY]) Posted on: Sep 24, 2022 1:36 AM
Message:

success! it took quite some time under the counter behind the dishwasher but I was able to cut back to sound pipe and marry it all together. I just saved myself a few thousand on a plumber and avoided a kitchen reno. --172.58.xxx.xx




cracked cast iron (by zero [IN]) Posted on: Sep 26, 2022 6:27 AM
Message:

Congrats on the sound repair!

I hate working on the old cast pipe. Never know when a bump will ruin your project midway. --107.147.xx.xxx




cracked cast iron (by Steve [MA]) Posted on: Sep 26, 2022 6:30 AM
Message:

On old fragile cast-iron pipe, we've been more successful using a grinder with a thin metal cutting wheel than with a snap cutter or a Sawzall. --71.184.xxx.xxx



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