Lawn irrigation — even coverage for turf, not a guessing grid

Measure supply, then size turf zones to the math

Static pressure and gallons-per-minute cap how many turf heads run together. Zone count is arithmetic, not preference — overloaded lawn zones are the classic cause of misting near the valve and dry tips at the far end. Design from available flow and pressure, not from a catalogue photo of a green rectangle.

Watch for: A “six-zone package” quoted before anyone buckets-tested your spigot. Packages ignore your meter and service line.

Split turf by microclimate, not only by front and back

South-facing open lawn and north-side shade under trees want different runtimes. Putting them on one valve forces you to overwater one to save the other. Commission with catch-can or equivalent checks so the first summer is not a surprise audit from the city.

Watch for: One big backyard zone that includes deep tree shade and open sun. The shade becomes fungus territory while the sun still browns.

Pick rotors, sprays or rotary nozzles for the geometry

Large open panels often suit rotors; smaller panels suit sprays or high-efficiency rotary nozzles. Mixing precipitation rates on one valve is how turf becomes striped. Backflow, winterization access and valve box placement are part of a complete lawn system, not extras.

Watch for: Rotors and fixed sprays on the same lawn valve because the trench was convenient. No schedule repairs that hydraulic mismatch.

Lay out head-to-head coverage and hard-edge control

Each head should throw to its neighbours. Edges along drives and sidewalks need arcs and radius set to keep water on grass — runoff is wasted money and sometimes a compliance issue. Head-to-head coverage is the target; triangle/square spacing mistakes show up as brown polka dots.

Watch for: Heads spaced to catalogue maximum radius with no overlap. Dry wedges appear between heads every July.

Handle strips, slopes and parkways as first-class zones

Narrow strips need strip nozzles or carefully chosen patterns; slopes need cycle-and-soak programming so water infiltrates instead of sheeting to the curb. Edge nozzles and square patterns protect hardscape and foundations from constant overspray.

Watch for: Full-circle heads hammering a four-foot parkway. That is pavement watering with a grass alibi.

Backflow, wire, controller and a turf-first schedule

Code-required backflow protection, spare wires for future zones, and a controller programmed by zone — not one runtime for the whole lawn — finish the job. As-builts matter when heads get hit by aerators later. Sun and shade turf often need separate zones or different schedules even when they share a yard.

Watch for: No spare conductors and no drawing. Lawn systems get altered; future you will dig either way.

Commission with catch-can style thinking

Run each zone, fix radius and arc, and look for plumes, fogging and dry corners. Adjust nozzles before blaming the grass variety. Design from available flow and pressure, not from a catalogue photo of a green rectangle.

Watch for: Handover without running the system in daylight with you present. Night-only demos hide coverage sins.