Found a mystery wire during R3 install


#1

Bought this house s couple years ago… No information turned over regarding the irrigation system. Been using the 5 zones (29 sprinklers) in manual mode since moving in without issue.

Swapping out for a Rachio 3 just now, found this brown wire just hanging out. I connected it to a zone and nothing happened. Could it be a master valve? If so, how do I test it? If it’s not, will it hurt the Rachio to wire it in?

Thanks for the help!


#2

Hi Avery,

It is unlikely to be related to something important (like master valve), since you were able to water other zones without it. You can use a multi meter and check resistance between that wire and commons, but frankly the test you’ve tried (simply plugging it in and activating the relevant zone) is just as good.

I would mark it as unused (spare) and leave it be. If you can find your valve box and take a picture inside, the mystery of the extra wire can likely be solved.