Fred's advice above is exactly where I would start. My Boxxer had a hairline crack in the meter and it would not work. even after I tried to silicone it. Does it prime when you plug your vac hose?
It tries to prime. Just keep’s bubbling
It's sucking air.
Where do you think it could be?
You have to look for it. Could be the tubing or like others said could be a fitting or the meter itself. Over tightening is often an issue with brass fittings. They Crack from the vibration over time. Replace the cheaper parts first if you're not sure where to start and eventually you will find the problem. The parts you replace probably need replacing even if they are not the issue at the moment.
Probably getting air before the pump then.
Did you check all the o-rings on the valve too?
Yes they look good
I took the check valves on chem pump and inspected them and they looked good. Should I remove the whole chemical pump? Could it be something there?
Lol I want a aerotec
join the plumber's union first.
