Hi Ed, Adding a new valve (or valves) is the best way to do what you want to do. That way the irrigation controller can handle all the timing requirements of the added zones. Assuming you have one functional valve running at the location where you want to add zones you can use one of our Irrigander irrigation expanders to add additional valves using just the field wiring already in place. This will simplify the installation. Visit our website at www.irrigander.com for more information. --Don
