Or two hose ends are welded together. (One was brass, one was "something bright silver".)
Would Oatey "Great Blue" Pipe Joint Compound or Harvey "TFE Paste" prevent this? Again, this is more than just a matter of, say, iron-to-iron getting stuck together - here we have dissimilar metals corrosion at work.
Bah!
Anybody know / have experience with this?
Of note, Apparently Oatey owns Harvey, but the two products ingredients lists are significantly different... Also, the Oatey product is blue, is rated for PET, and costs less per oz.
I used to like Harvey and Oatey’s music back in the 70s and 80s . . .
Look for sealants used in food processing.
https://www.saftlok.com/stl/TPS-FD_Pipe_Sealant.htm
https://www.plus-co.com/products/plusco214-thread-compounds-food-grade-sealant.html
MOLYKOTE 112.
Anybody?
What’s the best stuff to use on black iron pipe for gas lines?
BECAUSE LIGHT BULB BASES are no longer brass and are now aluminum-—I have found that I have to use SPRAY DRY Silicone on the bulb base, before I replace a burned out bulb.
The fixtures are also aluminum...
Had a bulb weld itself to the fixture. Had to shut down the house power to get it all taken apart.
Started using the spray silicone after that-— NO MORE Problems.
For wheel lugs & lug nuts, I use ANTI SEIZE, which is a ‘paste’ with a brush attached to the cap. NOT expensive-—keep it in the car along with other spares.
ANYWHERE I have to assemble nuts & bolts that might have to be DIS-ASSEMBLED—even corral clamps, I use Anti Seize.
Some of the best I’ve used for home and industrial piping systems. Our go-to in industry was RectorSeal number 9. For home systems T plus 2 and no. 5.
https://rectorseal.com/brands
https://rectorseal.com/rectorseal-t-plus-2-group/
https://rectorseal.com/rectorseal-no-5-group/
Put Teflon tape on everything. Tighten until it stops leaking.
Really? I lose sleep at night just hoping I have water in the morning, here in Arizona.
Will the dissimilar metals ever touch? Of course, that’s what threads do.
Will water be present anywhere where the two dissimilar metals touch, permitting ionic exchange? Of course.
Put plastic sleeves/fittings between the parts or go all one metal.
Can’t do it cheaply.
“A dielectric union is a special adapter or fitting utilized in the piping systems of various metals to isolate the connection of the dissimilar metals.”
A plumber for over 35 years and I NEVER concerned myself with this issue. I never saw it being an issue.
Rectorseal #5 pipe thread sealant. Is what I ALWAYS used.
Better than nothing. Silver anti-seize is what we use.