Gold River, Calif.-based CTS Fabrication USA produces lead-free dielectric companion flanges. CTS Fabrication USA’s patented two-piece copper companion flanges have been in existence for more than 16 years and have never experienceed a dielectric failure, the company states. In its design, CTS has the important EPDM rubber insulator separating the copper fitting from the steel-backing flange, assuring an electrolysis-free Installation. CTS’ website at has many resources available, including list prices, specification sheets, installation instructions, rep locations and galvanic test results. For more information, call 916/852-6303.