I am curious for someone wise about this to reply and help you out due to Iwaki being sort of like a Chevy V8 of water-pumps, I guess, and I'm wondering how they are nowadays. Never owned one, but back in around 2007 was planning to implement it in a loop based on experiences shared here at XS.
Check this out: https://endless-sphere.com/forums/vi...hp?f=2&t=42793
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