Posted by William (22.214.171.124) on November 17, 2002 at 23:38:18:
In Reply to: galvanic reaction posted by Pablo on November 16, 2002 at 19:48:34:
: Does connecting a copper fitting to a black iron cause a galvanic reation? Is a dielectric union required?
I would say "yes" to the the dielectric union. Be sure the unit on the isolated side is grounded with a copper ground rod or equal. If this is a water heater installation, and the the water heating method is electrical then for sure ground the heater to a good source. Using dielectric unions will preclude joint problems during the life of the heater installation.
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