Water heater, anode rod, electrolysis, and teflon tape

It is often stated on RV forums that you should not use Teflon tape on the anode rod threads as it could interfere with the electrical contact.

While it may be often stated I have yet to see one that wasn't rapidly corrected. Everyone makes it too complicated. A voltmeter set to ohms will quickly prove that there is still continuity with the use of tape. you are dealing with microvolts so it takes very little contact.