Sprinkler System Basics: Watering, Zones, and Winterizing

TL;DR: One frozen sprinkler pipe can cost thousands. Four basics keep your irrigation efficient in season and protected in winter.

_Last reviewed: July 2026 · 2 min read_

A sprinkler system saves time and water — but a single line left full over winter can freeze, crack, and cost thousands to repair. Four basics keep it efficient and protected: know your zones, water at the right time, winterize before the freeze, and inspect each spring.

Why map my sprinkler zones?

Map your zones — know which heads water which part of the yard. Understanding your zones lets you adjust each one to what it actually waters (lawn vs. beds vs. shade), spot a malfunctioning section fast, and avoid over- or under-watering. A simple zone map turns a mystery controller into something you can actually tune.

When is the best time to run sprinklers?

Water before sunrise to beat evaporation and fungus. Watering in the heat of the day wastes water to evaporation; watering in the evening leaves grass wet overnight, inviting fungus and disease. Early morning lets the water soak in and the blades dry through the day — the most efficient, lawn-healthy time.

How do I winterize a sprinkler system?

Blow out the lines before the first freeze. Water left in the pipes and heads freezes, expands, and cracks them — the most expensive sprinkler failure. Shut off the supply and use compressed air to blow out each zone (or have it done), so there's nothing left to freeze. It's the key step on any fall checklist in cold climates, like winterizing outdoor faucets.

What should I check each spring?

Check every head each spring for clogs and misalignment. Over winter, heads get clogged with dirt, knocked out of alignment, or damaged. Run each zone at startup, clear clogged nozzles, straighten tilted heads, and fix any that spray the driveway instead of the lawn. A spring once-over is part of spring maintenance and keeps coverage even.

Track the seasons

Logging your blow-out date and spring startup keeps the system protected and tuned. Okoniq Property Hub keeps it with your home maintenance records in one private place.

Frequently asked questions

Do I really need to blow out my sprinklers?

In any climate with hard freezes, yes — draining isn't always enough, since water trapped in heads and low spots still freezes. A compressed-air blow-out clears it. In frost-free climates, it's not necessary.

How much should I water my lawn?

Generally about an inch of water per week (including rain), delivered deeply a couple of times rather than a little every day — deep, infrequent watering grows stronger roots.

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FAQ

How much does it cost to hire someone to blow out my sprinkler system?

Most professionals charge $50 to $100 for a standard residential blow-out, depending on your region and system size. That one-time cost is far less than the $1,000+ repair bill for a single cracked mainline or backflow preventer.

Can I use my leaf blower to winterize my sprinklers?

No — leaf blowers don't produce enough sustained pressure or volume to push water through the entire system. You need a large air compressor (at least 10 CFM at 50 PSI) or a professional blow-out service to clear every zone safely.

What's the difference between manual drain valves and automatic drain valves?

Manual drain valves require you to open them by hand each fall to let water out; automatic drain valves open on their own when pressure drops. Neither replaces a blow-out in freezing climates, since some water always remains trapped in low spots and heads.

How do I know if a sprinkler head is broken or just clogged?

Turn on the zone and watch — a clogged head dribbles or sprays unevenly but still has pressure, while a broken head may gush at the base, not pop up at all, or spray in a completely wrong pattern even after you clear debris.