Is this dielectric?

[pwigle]

Can you determine whether this is a dielectric connection?
Thanks

[Michael Larson]

Can you say Electrolysis?

[Bob Elliott]

That is copper to galvinised and need s a dielectric union peter.
This is a coupling which would screw over both.
These are joined directly together.

[Larry D. Kage]

For example

[Frank P. Newman]

I'm not sure I think of it as a 'dielectric' (a material or medium that does not conduct electricity), but is is definitely a case of "galvanic corrosion" that should not exist. As mentioned above, what it needs is a 'dielectric coupling'.

[pwigle]

Thanks folks. I knew it was corroding but wanted to be sure it was not some sort of dielectric device that I hadn't seen (since the connection was not just copper to galvanized, but apparently copper to copper to brass to galvanized - and I could not be sure what might be hidden).

[pdickerson]

A little off topic but... I have heard a plumber say that he sees more leaky dielectric couplings than he sees problems with direct copper galvanized connetions. Anyone care to comment?

[Barry Adair]

Originally Posted by pdickerson

A little off topic but... I have heard a plumber say that he sees more leaky dielectric couplings than he sees problems with direct copper galvanized connections. Anyone care to comment?

Sounds like a great way to build a service business

1) removes all dielectric and replaces with dissimilar metal connections
2) home inspector calls them out for corrosion and leakage potential during a resale
3) reinstalls
4) something goes awry a few years down the road
5) back to #1 and the non-ending cycle continues

[Joe Funderburk, CMI]

That connector looks like brass to me.