Posted on 08/25/2024 10:12:24 PM PDT by Paul R.
Sometimes one runs into the problem of pipe or hose connectors made of different types of metals needing to be threaded together. This can happen when replacing plumbing in an older home, or, for that matter with garden hoses and fixtures.
There are of course various anti-seize products on the market, and I've used Permatex 80078 to good effect on occasion, but, I rather question if it should be used in potable water situations, or even for hoses out to the ol' garden. Oatey "Great Blue" Pipe Joint Compound or Harvey "TFE Paste" work well as pipe joint compounds, but are not to my knowledge rated for use with, say, brass to other metals threaded connections (to use the garden hose example.) Or, maybe they are???
“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.
Depending on what we are talking about, in the plumbing system of a house when connect connect two dissimilar metals you always use a dielectric union, at least that’s how we did it back in the day.
Better than nothing. Silver anti-seize is what we use.
As a repair plumber you never noticed the problem of copper and galvanized being together when you were repiping old houses?
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