What happens to sprinklers when turf is removed?

Spray heads in the old lawn area should be capped below grade so they stop spraying rock or soil. If the new landscape includes shrubs or trees, they need drip on their own station. Leaving old heads active wastes water and can spray onto paving.

Do new plants need their own zone?

It helps. New plantings need frequent water for their first weeks and then a gradual stretch to longer intervals, while established desert plants need water far less often. A separate station lets the new group taper off without overwatering mature plants that share the bed.

Irrigation Zone Addition and Expansion

Add a station or extend one when beds change, turf comes out or plants outgrow their emitters.

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The yard changed; the valves did not

Surprise landscapes change in predictable ways. Lawn comes out, often with help from the city's turf removal rebate, and shrubs and rock go in. A new bed goes along the back wall. Trees planted with the house now shade half the side yard. Usually the existing stations just get more tubing tacked on, until one valve feeds plants with opposite needs or so many emitters that the last ones barely drip.

The city's turf removal terms show what the new landscape has to look like. Under the program parameters for July 1, 2026 to June 1, 2027, single-family replacement landscaping needs living, desert-adapted plants reaching at least 30 percent canopy at mature size, every new plant on the state's Phoenix Active Management Area list, and no plastic sheeting. Those plants need drip, on their own station, which is why a conversion is usually a zone job as much as a landscaping job.

Building the new station

A new station needs a free terminal on the controller, a valve tied into the mainline where it can be reached, a wire run back, and delivery that matches what it waters: drip with a filter and pressure regulator for shrubs and trees, spray only where grass remains. Spray heads left in the old lawn area are capped below grade instead of being left to spray rock.

The station is then sized for its plants. University of Arizona Cooperative Extension advises emitters at and beyond the dripline as plants mature, and the city's guidelines put new desert plants on a short eight-week schedule before longer intervals, then suggest moving emitters to the outer edge of the root ball. A separate valve lets new plants taper without overwatering the old ones. Related pages: drip irrigation and irrigation system installation.

Source: City of Surprise, Water Conservation Rebate Program Parameters, Checked Oct 1, 2026