Mark

We still don't think in terms of "quality". A electric pump can either do the job or it can't. If you've changed the pump and still have the same issues, you could have a electrical issue or possibly an hydraulic power output issue.

Has anyone done the simple stuff? Are all three phases there? Have you put an Amp Clamp on each phase to make sure they're pulling the same amps? Have you tried another source of power input?

These are basic things to check. Don't think in terms of quality..... try quantity (amperage power).