He asked about his pump leaking. He knows thats where the leak is because it happens with all his cylinders. Why you guys keep giving advice about finding the leak in the tube is beyond me.
You’re pump screws apart in the middle. (or at least mine does) Look for a rubber seal, it’s likely a wet one that needs to be dried. Good luck and hopefully your pump comes apart as easy as mine.
When you pump with water in the cylinder. If any gets up into the pump itself, it will get to that seal. And once it does it leaks. After you dry that thing, it’s like a brand new pump.