Please help me understand my plumbing - 3 suction lines and 1 sucks air?

[mikeingeorgia]

Figured it out. . may all my problems in life be figured out before I get a reply to a question!

 

[Davejavu]

Maybe it's for a vacuum? Do you have a port somewhere for a vacuum hose to plug in? You could maybe trace it by blowing air from a shop vac into the suction lines at the pump with the skimmer and drain valves closed. Then listen for the noise of escaping air or bubbles in the pool.

 

[mikeingeorgia]

Dave, That was exactly it. I didn't realize it because there was a "discharge port" on the line, but it certainly is a vac line. I'll be hopeful that my leak is in that line alone!

Thanks!