My danner exhibits no wear or tear whatsoever. The impeller floats in a magnetic field. There are no seals or brushes to wear afaik. Just don't operate it without water or else it will overheat and burn out.
I think it would be those overheating burnouts or electrical shitzap that you should be more ready for.
Well my suggestion for that would be to make a circuit that allows you to feed power to the pump first before power is fed to the PC.
I think you'd be needing a relay or something. Let me try to look for the diagram somewhere.
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