Don't know, except....all systems are set up in "zones". Sprinkler clocks have the ability to run multiple.

Maybe what you won is a one-zone sprinkler system. That would be great. And, Just Sprinklers has a good reputation.

Didn't get to go. Had to teach a class.

a drip zone is the area just where the branches of a tree end up. the outer circumfrence sp? of the branches.
if your tree is this below, the + signs are the drip zones, or where the branches end.
+________+
:
: