Evidence of excessive corrosion which will ultimately fail to operate. 

Aluminium flange next to copper seachets works as anode to the copper. Damage could have been preventing by adding Easyanodes in the seachest.

Un-bonded and unprotected will accelerate corrosion.

By retrofitting EasyAnodes 

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You guessed it, it leaked!

You can easily improve the corrosion protection by adding a corrosion indicator and protection to your sachets lid. 

Rapidly depleting EasyAnodes highlighted the need to investigate the cause.

Different stages of EasyAnode depletion.