On Sat, 26 Oct 2013 18:06:51 -0700, Ashton Crusher
wrote:

Why would it be expensive to insulate them? You would only need to
insulate whatever part is above ground. Stuff I would think plenty
good enough for AZ is a little over a buck a foot.
http://www.homedepot.com/p/Tubolit-1...3357677?N=buy9

Exactly!

In 18 years of living in the desert, I've only had one (outside hose
bib) brass pressure vacuum breaker valve freeze and break. Easy to
cover with some old flannel shirts in the winter. PVC pipes done with
the foam and a few strips of duct tape.