Jeff Wisnia posted for all of us...

Sac Dave wrote:

Brass is neutral metal and will work.




I'd love to hear what makes you think brass is a "neutral metal", Sac Dave.

Have you ever even bothered to look at a galvanic table?

Try spending some time reading articles like this one:

http://tinyurl.com/5sekem

before you hand out totally incorect advice.

*******

Regarding the OP's mention of water heaters, the use of dielectric
unions on them is passe, as stated by Rheem in this bulletin:

http://tinyurl.com/5e56ub

Jeff


Muntz metal heh heh heh!
--
Tekkie Don't bother to thank me, I do this as a public service.