: These systems work quite well at draining
: themselves. Remember, there is an emitter
: every few feet allowing the water to drain.
: Your real concern would be the mains and
: header lines. You can install manual drains
: at low points, like a simple gate valve.
: There are automatic drains available, too.
: --Previous Message--
: I have a small orchard (approx 35 trees
: & some assorted berries). I would like
: to install a SDI system. I have read in many
: places that explain how to run a main line
: and then tap into it with emitter tubing and
: wrap around the tree. However I have found
: no information on whether this type of
: system will work if the ground freezes, and
: if it will what you have to do to drain
: these systems for the winter.