What is the easy way to know the builder of your pool

We recently bought a house which came with the pool. We dont know who built our pool. It is not possible to check with the previous owner as well. Is there any other way to get that information?
Since I was having problem understanding certain details, even I dont know the size of the pool or the materials or the information regarding which valve is for what, I thought the best way would be to identify the builder and give them a call or request for some information or manual or that sort. Any ideas?
Thanks for the help!

I don't know how you would get that information, unless maybe one of the neighbors was around when it was being built. If the previous owner was using a pool company to open/close or maintain the pool, they may be able to answer your questions if you can find out who it was. Maybe the realtor knows?

Most generally, there would have been permits pulled from your city/county authorities. You can check with them to find the builder. These are public records that you as the owner of the house would have access to. You will find a LOT of info on your property at the county courthouse.

Thanks Charlie_R, Aylad.

I guess I should give a call or pay a visit to the county court!