Clearly an inefficient way to pump seawater.

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Damage like this will lead to major equipment damage if left unchecked.

Galvanic corrosion working well.

Irreparable damage

Another one for the scrap bin.

This coupler connecting the motor and pumps suffered as a result of insufficient bonding.

The corrosion activity in black water tanks is very high. Painting and repair is expensive and time consuming.

Stainless steel parts that are anodic to the rest of the piping system will suffer corrosion damage.

You can always add a Tee with a corrosion indicator before your pump. Especially recommended in areas where different materials are used for seawater system.

Clear evidence of impending failure

Different stages of EasyAnode depletion.