Les
I suspect it will be found that the MCP600's P-Q curve is a lot closer to reality due to its having a closed impeller (as do the Iwaki high pressure versions)
The factory QC check is to run each pump for 3min., then verify 3 points on the P-Q curve.
And here we are running ~30% of the pumps for 3 to 24hrs under various load conditions to see ‘what we find’, so far only the noise reduction
pHaestus
we are finding that the noise is substantially less after 2 days or so of running (grease in the ball bearings)
and an additional note re the MCP600:
it does NOT tolerate 1/4" fittings on the inlet
- it will work for a while, but it is cavitating; and when sufficient air has built up in the pump housing it stops pumping
still running but not pumping
put those Innovatec reservoirs in a system with an aquarium pump
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