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-   -   Water heater nipples after 3 1/2 years? (https://www.thehulltruth.com/dockside-chat/1057333-water-heater-nipples-after-3-1-2-years.html)

Kenny Powers 01-15-2020 08:19 AM

I don't know what's wrong with your nipples.... but here's what a good pair looks like.

https://cimg0.ibsrv.net/gimg/www.the...81a284ac9f.png

bjm9818 01-15-2020 08:28 AM

I’ve had something happen on a rental so didn’t notice if for two years.
But Only one side, my guess was when I sweated the copper the pipe thread dope melted a little causing a slight leak.

Depending on how bad things are with the water heater threading when you take off the nipples you may just want to replace the tank and start over

saltyreefer 01-15-2020 09:14 AM


Originally Posted by Kenny Powers (Post 13268151)
I don't know what's wrong with your nipples.... but here's what a good pair looks like.

https://cimg0.ibsrv.net/gimg/www.the...81a284ac9f.png

Those ainít no Home Depot nipples 😁

saltyreefer 01-15-2020 09:19 AM

Last summer I installed a transfer switch and at the same time we abandoned the old single ground rod and installed two new ground rods, had a permit and everything passed inspection. So Iím not thinking itís a grounding issue unless itís between the tank and panel box. Thereís also a ground clamped to the copper pipe.
Iím going to attempt to remove the nipples this weekend and go with either the braided hoses or those unions that were previously posted.

saltyreefer 01-15-2020 09:20 AM

And go with stainless or brass nipples.

popeyeiii 01-15-2020 09:46 AM

I gotta say, I was expecting something else when I read the title of this thread.

willf650 01-15-2020 09:59 AM


Originally Posted by saltyreefer (Post 13268360)
And go with stainless or brass nipples.

Dielectric nipples, neither stainless or brass.

The supply/outlet side of my hot water heater is rusted but not as bad as yours, Mine is due to leaking/weeping caused by the thermal expansion of the pipe as its heating up and cooling from use. The inlet side which doesn't fluctuate in temperature as much is fine. I doubt its an electrical issue.

edwardh1 01-15-2020 10:34 AM

why is it rusting on the outside? is it leaking?

where is it located- if in a garage Id be afraid to mess with it

saltyreefer 01-15-2020 11:01 AM

Itís in the garage, it had a small drip/weep from one of the nipples but the corrosion seemed to fix that lol
Ive put off repairing it due to getting busy with other jobs and forgetting about it. I gotta do something with it soon though.

Still Stoked 01-15-2020 11:08 AM

If you did indeed have a weep leak, that’s the initial culprit.

I know code calls for bonded plumbing systems, but attaching a ground to a metal plumbing system CAN cause problems. I’ve seen it. Verify good electrical bonds and grounds, and remove the plumbing bond wire.

Just1more 01-15-2020 12:13 PM


Originally Posted by saltyreefer (Post 13267345)
Going into the heater?

Yup. That's electrolysis going on there.


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