I don't know about you guys but when I installed my lawn sprinkler system I found out that code was to have double check and anti-siphon valves to protect against this very thing. I also found out there was no such code for our domestic water system so I installed double check and anti-siphon valves on my domestic water supply at the entrance to my house just after the meter.
BBQ Team: Lawn Guyland Smokers
Stupidity for Dummies
…because sometimes, you just can’t dumb it down enough…