Closing inground for 1st time. Blew and added anti freeze to all lines and save three return lines for last. All returns are below the water line and.

[Obiwan Kenobi]

While blowing air through I capped lines one and two. No matter how tight it screwed in the caps they both bubble a little. I capped the third which did not bubble. I figured the air pressure from the blower was just a bit too much. When I shut off the blower the bubbles continued. I added a gallon of anti freeze and think I am Ok. Any thoughts?

 

[Bill1974]

Replace the o-rings on the caps and try again.