What Seasonal Maintenance Does a Sprinkler System Need?
A sprinkler system that is properly maintained lasts 15 to 20 years. One that is neglected develops expensive problems. Here is the seasonal maintenance schedule.
Fall: Winterization
Winterization (blowing out the system with compressed air before the first hard freeze): the most critical annual maintenance task in climates where the ground freezes. Water remaining in pipes and heads expands when it freezes, cracking the pipe, shattering the head bodies, and bursting valves. A single freeze event on an un-winterized system: can cause $500 to $3,000 in repair costs. Winterization procedure: shut off the irrigation water main, connect an air compressor (at least 20 CFM at 50 PSI) to the blow-out port, and cycle through each zone for 2 to 3 minutes until water stops discharging from the heads. Professional winterization: $75 to $150. DIY winterization requires renting or owning an appropriately sized compressor.
Spring: System Startup
Spring startup (reactivating the system after winter): open the main shutoff valve slowly (to prevent water hammer), walk each zone while it runs and inspect every head for: proper operation (pops up and retracts cleanly), correct coverage pattern (not spraying hardscape, not creating gaps), and any heads that were damaged over winter (cracked bodies, missing nozzles). Adjust any heads that have settled or shifted. Test the controller program: confirm the seasonal schedule is appropriate for spring conditions (spring requires less irrigation than summer). Spring startup service: $75 to $125 professionally. DIY: allow 2 to 3 hours for a thorough inspection and adjustment.
Summer: Monthly Inspection
Walk the system while it runs once per month during the irrigation season. Look for: broken heads (water geyser instead of normal spray), heads spraying pavement or the home’s foundation (waste and potential damage), heads that are tilted (from foot traffic or settling), zones that do not turn on (valve failure), and puddles in the lawn after irrigation (a leaking head or a crack in the lateral pipe). Catching problems early — a broken head replaced for $8 to $15 — prevents the $300 to $500 valve or controller repair that develops when a problem is ignored for a full season.
Working With a Contractor on This Project
Getting the right outcome on any home services project starts before the work begins. A few consistent practices make the difference between a smooth project and a frustrating one.
Get at least two or three quotes. A single quote gives you no basis for comparison. Two or three quotes reveal the market rate for the work, expose scope differences between bidders, and let you assess contractor communication quality before any commitment is made. The lowest bid is not automatically the best value if the scope is thin or the materials are underspecified.
Ask for licenses and insurance before work starts. Verify current general liability insurance and, for any work involving workers on your property, workers compensation coverage. Licensing requirements vary by state and trade; confirm the specific requirements in your jurisdiction. A licensed contractor who carries appropriate insurance protects both parties if something goes wrong during the project.
Get the scope in writing. A written proposal that specifies materials, labor scope, timeline, what is included (permits, cleanup, disposal), and warranty terms is the foundation of a professional engagement. Verbal agreements on any of these points invite misunderstanding. For any project over $500, written scope is non-negotiable.
Clarify the payment schedule upfront. A reasonable payment schedule ties major payments to project milestones: a deposit at signing, a payment at material delivery or project start, and a final payment at completion after a walkthrough confirms satisfaction. A contractor who requires full payment upfront before work begins is a red flag in any trade.
Making a Confident Decision
The information in this article is designed to help you ask better questions of the professionals you work with, evaluate their answers with more confidence, and understand the decisions involved in this type of home services project. It is not a substitute for professional assessment of your specific home.
Every home is different. Roof slopes, local weather, tree exposure, soil conditions, and existing system condition all affect what the right solution is for your specific situation. The general principles here apply broadly, but a professional who assesses your home in person will give you guidance that accounts for the details that general articles cannot.
When you are ready to move forward, getting at least two or three quotes from licensed, insured, local contractors is the most important practical step. It lets you compare approaches, assess contractor quality, and confirm that the solution proposed matches your specific situation and budget.
Frequently Asked Questions
Before the first hard freeze (a sustained temperature below 30 degrees F). For most northern US states: late September to early November. The specific timing: when overnight lows are consistently dropping below 35 to 40 degrees F. Do not wait until after a freeze event -- freeze damage to irrigation components is expensive. Schedule professional winterization in September for guaranteed availability before the first frost.
Yes, but it requires an appropriately sized air compressor (20 CFM at 50 PSI or more -- not a standard homeowner compressor). Most hardware stores rent suitable compressors. The DIY procedure: shut off the water main, connect to the blow-out port, cycle through each zone for 2 to 3 minutes until no water discharges. Risk: using too high a pressure (over 50 PSI for plastic heads) can damage heads and valve diaphragms. Professional winterization ($75 to $150): reliably prevents damage and is the lower-risk option.
Turn off the zone, dig around the broken head to expose the riser (the vertical pipe the head screws onto), unscrew the broken head, and screw on a replacement of the same brand and nozzle specification. Heads: $8 to $20 at most hardware stores or irrigation supply houses. Confirm the replacement head has the same radius and arc setting as the original. Most head replacements are 10 to 20-minute DIY repairs.
Low water pressure in the zone (a partially closed valve, a leak in the lateral pipe reducing pressure). Dirt or debris in the head body preventing the popup mechanism from extending. A damaged or bent riser. Check the zone's water pressure first: a pressure gauge on the test port can confirm whether the system is receiving adequate pressure. If pressure is adequate: disassemble the head and clean the body.
Quality sprinkler heads (Rain Bird, Hunter, Toro): 10 to 20 years of service life with normal use. Heads in high-traffic areas (near driveways, lawn play areas): 5 to 10 years. Annual inspection during spring startup identifies heads that are performing poorly and should be replaced before the irrigation season begins.