I am making a misting system for my back patio that consists of 1/2" pvc and connectors that have the misting nozzle drilled. I am putting a nozzle every 2 feet and going about 30 feet down my patio cover
I plan on using a sprinkler water supply hard out that is currently capped off. Next to my other sprinkler valves and running 3/4" PVC to the patio and then convert to 1/2"after I run vertically about 8ft with the 3/4" pvc. The distance from patio to valve is about 14ft horizontally.
At the end of the 1/2" run, I am just going to cap the pvc.
My question is, what kind of valve should I use since this is a long run of pvc and it has height, meaning lots of backflow/pressure. I was thinking of just using a common sprinkler anti-siphon valve, but would the entire contents of the pvc exit the valve when I turn it off? My pool top off uses a gate valve with no backflow and it has a little water hammer effect on start and stop, but works fine. The exit is below the valve though.
I was hoping to use a sprinkler valve with a solenoid so I could eventually hook it up to my sprinkler controller and digitally control the misters. Eventually I would get the IP controller and be able to do it from my phone, but I want to make sure I handle all that water above the valve correctly.
Any assistance is appreciated.
Best Answer
I don't think you need to be concerned with using an anti-siphon device, as the potential for contamination is minimal (compared to water making contact with the soil).
If you want to automate then use an in-line solenoid controlled valve without anti-siphon, then you don't have to worry about the remaining water standing in the pipe length from running back out of it: