Larger suction pipe to pump - better?
All inside tubes, inlets on the pump, and suction tube from fresh tank are 1/2". 3GPM pump, 40 PSI on the push side, self-priming up to 10ft (I think). Now, imagine fresh tank 6ft away, sitting on...
Forum Discussion
When I plumbed my aux water tank to a 4.5 gpm 65 psi marine pump, I originally used a 1/2" right angle hose bib. It didn't supply enough water to the pump and there was considerable cavitation on the impeller. I upgraded to a straight 3/4" boiler drain valve and that solved the issue and improved the discharge.
