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Self-priming automatic electric pumps with helical gears, produced by Marco.

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Are these UP pumps reversable?

Can I reverse the flow on the pump? If yes is this done by reversing the polarity?

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What is the exact model number (or at least UP#) and is it a DC operated pump?

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Hi and thanks for responding. It’s a UP12 which is 24v DC.

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Hi Matthew,

It would appear that they are reversible by reversing polarity. Here's a booklet for them.

If your model has an inlet filter or pressure switch then the answer doesn't hold. This answer is for the bare transfer type pump. Some of those other models have bleeder valves, etc.

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The only attachment is a screen filter which I won't use. Thanks for the help and booklet link!

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Matthew Lilienthal will be eternally grateful.
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