Depending on the size of your property and whether you have both a drip system and a sprinkler system, your system will have one, several, or many zones, each controlled by a valve connected to a manifold. As an example of the minimum number of zones your system might require, 5-6 sprinkler rotor heads or 8-10 spray heads are generally the limit for one zone. Most of the systems we install have more than 10 rotor heads, with some zones having only a few heads to cover smaller areas or to accommodate longer or shorter watering intervals.