Quote:
Originally Posted by DOUGIE68
Tank pump will pump no matter the polarity.
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It will run regardless of polarity, however it won't shift sufficient liquid if connected the wrong way!
It is only a lift pump after all but to move the necessary amount of liquid, needs to be correctly connected.
The pressure pump is usually a roller cell type, similar in general principle of operation to a medical peristaltic pump but not quite the same, just helps with a visualisation of what is happening inside the roller cells. That certainly won't pump anything connected the wrong way round!