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Since I received no responses so far, I hooked up the pump and primed it. I put it below the tank water line to start, and water came out the discharge end without
running the pump.

I must not...

Hello,

I have a Grundfos pump that I have not tried yet in my solar drain back system. I am wondering if this pump is self-priming
(suction)?

Along with this question, I have another question...