Need Help Identifying Valves

[cowboy22]

Need some help identifying valves on a new build I "inherited". Pool has not been filled yet.  Pool has a spa, two skimmers, bubblers on tanning ledge.  I assume those on the left are for the skimmers, bubblers and cleaner?  Main concern is identifying drains and what the smaller PVC on the far left is for.  

[Pool Clown]

Valves From left to right:

Valves 1-3 controls return or water returning to pool from filter /heater (note: valve 3 is main return to pool).

Valve 4 controls where water is sent, back to pool (left side) or back to spa (right side).

Valve 5 controls where water is drawn from.  From pool (to the right) or from spa (left).

Valves 6,7 and 8. controls water drawn from pool. (guessing) skimmer, main drain, vac line? 

Pipes on the left: small one, not sure.  Looks like an unused conduit.  Larger one is the cleaner output back to the pool, or rather to the cleaner head.

Not being there in person to confirm this, the above is a "best guess"

[cowboy22]

Thank you!  That's a tremendous help.In looking at everything again, I'm thinking the small pipe on the left may be for the auto fil and is not hooked to water yet.