So, last summer I hard plumbed the line from my pump to my sand filter with 1 1/2" pvc. As always, I bought extra pvc pipe in case I made a mistake somewhere. Once I got done, I threw the extra pipe behind the "pool box" and forgot about it. This year (actually, this weekend), I plan on installing a thru the wall skimmer and hard plumbing everything. I know a trip to the hardware store is in order for fittings, valves and some more pipe, but can I use the pipe from last year? Or should I just start over and pitch it?? It has been laying on the ground, getting sun, wind, rain and snow for the last year.