Disconnect the output hose from the pump, then connect a section of hose to the pump that has a cock on it, turn the pump on, bled the air and close the cock.
Now if the pump comes up to pressure, and stays off, you know the issue is on the pressure side, not the suction side, or the pump it's self.
Originally Posted by WolfgangSeaLife
Thanks Stu. Testing the pump? Can I vent it, then run it, then disconnect the intake and no water should flow back out of the pump? In that case it can't be the pump. It would have to be a leak in the connection after the pump? Then trace the hoses from the pump.... Is there an additive to water that shows up bright under UV light? I could feed water into the pump from a bucket with that stuff. Just food coloring would not be well visible under gear and floors and cabinets.
Thanks for your help