Forum Title: Leak at threads
Hello, I have a 6 - year old 40 gallon Whirlpool gas hot water heater that is leaking at the cold water input threads. It looks like the installer cross threaded it. Can anyone recommend a way to repair this leak? I unscrewed it last year and applied a healthy coat of jb weld on it but it seems to have not done the job. Thank you, Jim
Category: plumber Post By: Denise Richardson (Madison Town, WI), 09/15/2017
I would never recommend using JB Weld on plumbing pipes. You will need to disassemble the cold water input threads and fix the problem correctly. If the pipes are damaged from being cross threaded, replace them and use teflon tape to reassemble. Are you certain this was not caused because of failing to install a dielectric union?

- California Air Conditioning Systems, Inc. (Jacksonville, GA), 10/16/2017

Is your problem at the top of the nipple where the flex line is attached or the bottom where it attaches to the heater? If at the top you would need to remove both the flex line and the threaded nipple and replace both and if it is at the bottom you will have to replace just the nipple and maybe run a tap through the heater threads and reinstall with teflon tape.

- Franklin Parks (Noble, IN), 10/16/2017

Quote: Originally Posted by Chris Is your problem at the top of the nipple where the flex line is attached or the bottom where it attaches to the heater? If at the top you would need to remove both the flex line and the threaded nipple and replace both and if it is at the bottom you will have to replace just the nipple and maybe run a tap through the heater threads and reinstall with teflon tape. Hi Havasu & Chris, There are no dielectric unions installed on this water heater. It is pex throughout the home and 18 of copper pipe at the water heater. The heater was installed in 2004 so I am not sure if dielectric unions were required by code then. I suspect the threads are damaged beyond repair. Can I tap them out to a larger size? Thank you, Jim

- Carolyn Ramirez (Oilton, TX), 10/16/2017

For Homeowners & Businesses - Advice, Tips, Help, Guidance

Request A Quote Sign Up