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Old 01-19-2012, 11:04 PM   #1
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Rusted at thread cast iron pipe


My house was build back in 1950. The water stop valve for toilet was licked at joints. After I took out the old valve, I saw the thread of the cast iron pipe was rusted and damaged to the end of the thread. I used Teflon tape to tape 2 times by counter clock wise and put on the new valve Brass Craft 1/2 OD.
The leaking is still happen. What should I do to stop the leak?
Home depot carries push in valves like Shark bite brand. can I use those for my cast iron pipe? Please help me. Thanks.

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Old 01-19-2012, 11:16 PM   #2
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Rusted at thread cast iron pipe


It's a steel pipe not cast iron. Try and remove the whole nipple and replace it with a new chrome plated brass one. Your going to need a pipe wrench.
Make plans to replace all of that old plumbing if it's not leaking now it will and it rust from the inside out. It will close up to nothing over time, and rust will continue to flake off plugging your faucets and toilet flush valve.

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Old 01-19-2012, 11:21 PM   #3
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Rusted at thread cast iron pipe


If you have access to the fitting the pipe nipple screws into life will be much easier for you.
Try heating the fitting where nipple screws into it a little then get pipe wrench as close to the fitting as possible before turning it.
Install teflon tape in clockwise direction,same as you install valve to tighten it
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Old 01-19-2012, 11:35 PM   #4
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Rusted at thread cast iron pipe


There is no slide on or compression fittings for steel pipe.
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Old 01-20-2012, 07:58 AM   #5
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Rusted at thread cast iron pipe


If you can't replace the nipple...

- remove valve
- 3-4 wraps of teflon tape in a clockwise direction
- spread pipe dope over the tape
- thread back together

Should be good to go!
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Old 01-24-2012, 11:13 PM   #6
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Rusted at thread cast iron pipe


Quote:
Originally Posted by burnt03 View Post
If you can't replace the nipple...

- remove valve
- 3-4 wraps of teflon tape in a clockwise direction
- spread pipe dope over the tape
- thread back together

Should be good to go!
I followed your tips and problem was solved. No more leaking.
I almost to replace the new nipple and I do not want to cut big hole around a pipe to access to the fit and nipple.
Again, thank you.

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