Looking forward to getting my pump and switch off the ground...
If you orient the pump head so the inlets/outlets are horizontal and on top (-o- ascii art), you will have much better priming success. Open the head up, and you will see why. The outlet hole in the volute is adjacent to the outlet near the centerline (at least on a March, and a Chugger is a clone). In your orientation, there is a tendency to trap air, which then gets whipped around when first started.Looking forward to getting my pump and switch off the ground...
If you orient the pump head so the inlets/outlets are horizontal and on top (-o- ascii art), you will have much better priming success.
You got me on that one, at least partially."...the best orientation would be with the outlet facing straight up with the inlet on the bottom..." -Walter at March
http://www.homebrewersassociation.org/forum/index.php?topic=11157.0
I see what you mean about the shape of the volute. I originally tried the horizontal orientation, but air was being trapped in the outlet of the pump because of the fittings attached to the outlet. I have no issues with cavitation in the vertical orientation and no noticeable flow decrease because of the 90.
FWIW, I havn't had priming issues since I started removing the trapped air in the pick up tube in the kettle (not at the pump) as demonstrated by BobbyM (thanks again Bobby).
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