Mine seeps past the anode rod thread when it's hot. After my first year draining the w/h and seeing how much water stayed in the compartment because of the lip around where it meets the frame round the aperture in the body of the rig, I made up an aluminum chute. It's attached to the floor of the w/h compartment, sits directly underneath the anode rod fitting and directs all the water overboard when the w/h is drained.
Overflow from the thermal relief valve is also captured by the chute.
Now we're home again after our Oregon Coast trip, I plan to drain the heater again and put new Teflon tape on the threads.
Frank and Eileen
No longer RVers or FR owners