I have a 24 AG and set it up with a 22" Hayward Sand Filter and a Super Pump 3/4 hp. Both where purchased new from EBAY, and even with shipping, beat everyones prices solidly.

The 1.5 pipe you can get from an irrigation supply house. For ours I used sch80 pvc pipe (gray color) for durability, weather resistant. Sch40 in the winter can easily explode when frozen, so winterizing is needed badly when using the thinner walled stuff. The costs of sch80 -vs- sch40 is significant.