Wireless flow meter with anti-siphon sprinkler valves

post by vrenwick on Oct 10, 2018

I’m located in Central CA and the common sprinkler setup in my area does not include a main backflow preventer. Instead, each sprinkler valve is anti-siphon. (See attached picture). Does anyone have experience with using a wireless flow meter in this situation or am I out of luck? I know the flow meter isn’t rated for potable water, but would it be crazy to install the flow meter upline from my sprinkler valves?

post by robertokc on Oct 10, 2018

Instead, how about installing a valve box near the meter and put a flow meter on the mainline of the irrigation system before it reaches these anti-siphon valves. These anti-siphon valves provide inadequate protection against backflow of contaminants into your home’s drinking water. I bet your city code requires either a pressure vacuum breaker or reduced pressure principle device. These devices meet the International Plumbing Code.