Hull Anodes

Start with the mounting style and the space available. Confirm whether it is bolt-on or strap-mounted and measure hole spacing and thickness. Then choose the anode size and profile that fits correctly. Material choice depends on your typical water type and what material you use elsewhere on the same system. Photos of the mounting area and measurements usually provide enough detail to confirm the right option.

Many hull anode setups rely on good electrical connection to the system being protected, which can include bonding arrangements. Whether your boat uses a bonded system depends on the design and fittings. The practical checks are to ensure clean metal contact at mounting points and to inspect any bonding straps or connections for corrosion. If you are unsure how your boat is set up, match what is currently fitted and monitor wear patterns.

Uneven wear can be caused by poor contact on one anode, missing anodes elsewhere, differences in immersion, or electrical issues such as stray current. Check each anode is seated on clean metal contact and is tight. Inspect bonding connections for corrosion. If one anode disappears rapidly, investigate shore power and charger setups, especially in marinas. Wear patterns are often a useful clue that the system needs a check.