Change at least every 6-months. But please note that in some "hot" marinas it can be necessary to change the anode more frequently.
Hallberg-Rassy 44 - 35 mm
Hallberg-Rassy 54 - 45 mm
Hallberg-Rassy 55 - 45 mm
Hallberg-Rassy 57 - 45 mm
Hallberg-Rassy 64 - 50 mm
