Hi,

I purchased a lot where the existing house burnt down to the ground, and the owner decided not to rebuild. They had a 20 x 40 pool with spa, so now I am in the process of figuring out how to get the pool up and running again.
The previous owner had his pump(s?) about 200' away from the pool. Figuring where the lines would likely be, I started digging, and low and behold I found the lines! Some of them were even marked right where I dug.

So the pool is 20 x 40 with built-in spa. The spa has 8 returns and two drains with two 1-1/2" holes each, connected under the spa. I pumped out the spa, so it has a separate drain from the pool. The pool has 2 returns, 2 skimmers, a sweep connection, an auto-fill, and probably a drain in the bottom; the pool is too cloudy to see the bottom.

These are the pipes I found (grouped in writing as I found them grouped in the ground):
2" unmarked
2" Pool Return

1-1/2" Pool Sweep
2" Pool Skimmer
2" Main Pool
2" ?????? Pool (first part illegible)
3/4" unmarked (I feel confident this is the auto-fill supply)

3" unmarked
3" unmarked

My father-in-law who has had his fair share of pools believes that the first unmarked 2" and the illegible 2" line go to the spa, and the two 3" pipes are for air bubblers.

Based on how they are grouped I believe the 1st unmarked may be one of the two pool returns (instead of having two returns on the same 2" pipe) , and the 3" lines are return and drain of the spa. However, that leaves me with one illegible line and nowhere to connect it to. I considered the skimmers could each have their own line, but then it probably would be marked as such.

Does anybody have an idea who is right? And what the illegible pipe could be for?
Thank you.

Berrie