Most residential sprinkler blowouts in the Spokane area run $75 to $150 as of 2026, depending on zone count. Book in September and aim for October 1 to 15: the first hard freeze usually lands by mid-October.
What it costs
| 4-zone system | Near $75 |
| 10-zone corner lot | Near $150 |
| Large lots, drip zones, commercial and HOA | More; quoted first |
Typical ranges as of 2026 from our own guides. Your technician gives you a good estimate; the final cost depends on what the job turns up. All prices.
When to book
Light frost can show up as early as late September. The first hard freeze, the kind that cracks pipe and fittings, usually arrives by mid-October. The people who call in the first week of October get their pick of times.
Water left in the lines when the first hard freeze hits in mid-October cracks pipe and backflow brass, and that repair waits for you in spring.
If a freeze beats your appointment
Close the main irrigation shutoff, set the controller to off, and insulate the backflow assembly with a cover or towels sealed under a plastic bag. Then keep your appointment: those steps buy time, but they don't push the water out.
Skip the shop compressor. Too little air leaves water in the low spots; too much pressure blows fittings and heads apart.
How it works
- Book your date. September or early October is the sweet spot.
- We blow out every zone. High-volume air through each zone, backflow drained, controller set to off.
- Ready for spring. Nothing cracked, and your spring startup is one phone call.