Let's see. It's an impeller pump, so pressure is going to be dependent on constrictions in the discharge, such as the bib to the mushroom, and vary inversely with flow, so we can't compute that one without seeing the system. Guesstimating from my larger propulsion
and genset engines, I'm going to say 5 GPM or less. Put a bucket under it and find out. Why? Careful...If you are thinking about using it as an emergency bilge pump
, that's a issue that sparks very strong feelings, with some people who know far more about it than I do saying never do it.