SleeperXJ
NAXJA Forum User
- Location
- Valencia, CA
The impeller degrades from "cavitation erosion", not so much from galvanic corrosion. tiny bubbles...
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I would agree with this also, but part of Hesco's water pump design is anti-cavitation. If you look at their impeller it is shaped way different than a stock impeller that acts like a paddle instead of a pump. I have witnessed aluminum props on boats errode from cavitaion, but in this application I think the impeller will outlast the bearing.
Indeed, the impeller did outlast the bearings. I just replaced a Hesco pump, the bearings were toast but the impeller is still good. I got 5 years out of this pump and another Heco just went in :cheers: