EveryDrop wired flow meters connect directly to a Rachio controller's sensor terminal to provide highly accurate, real-time water use monitoring and automated leak detection right in your Rachio app! (Not compatible with first-generation Rachio controllers.) Calibrate the flow meter to monitor water use for individual irrigation zones and trigger alerts for abnormal behavior. The device installs in-line on a standard 1-inch water supply line after a back-flow preventer. That means that you have to cut pipe in order to install, so we recommend you consider calling a professional to install your flow meter.