I just bought a house with a Hayward Sand filter (model SP711 I Believe). After backwashing/Draining this weekend I noticed the same thing, Sand in the pool and on the driveway after backwashing. I did however go through the rinse cycle for a minute or two. Should you normally "Rinse" longer? I'm going to search for an owners manual online now but any advice on a sand filter would be greatly appreciated as I've only had D.E. filters in the past. I will say that I love having the ability to backwash and pump out a lot of water without having to replace the D.E.

Dave