Yep, it sealed it. I don't think it is large at all, just a tiny leak that allows air into the lid over time. The joints are glued - I have flex pipe coming out of the ground into a plastic 90 which is then piped into the valve for each of the two suction lines.

He was pretty impressed with the picture I sent him showing the entire thing covered in shaving cream and the clear lid showing a full prime with no air. He is sending a tech out to silicone each of the joints leading into the valve for both suction lines.