As winter approaches, homeowners are reminded of the importance of preparing their irrigation systems for freezing temperatures. Failing to winterize these systems can result in burst pipes, damaged valves, and costly repairs.
Experts recommend either hiring a professional or doing the job yourself if you have the necessary skills and equipment. Professional services typically cost between $60 and $150, depending on system size and provider. However, those comfortable with home maintenance tasks can complete the process using an air compressor with at least 9 cubic feet per minute (CFM) capacity.
The procedure begins by shutting off the water supply at the main sprinkler valve, which is usually located near the water meter or building foundation. The compressor should be connected to the irrigation system at a back-flow preventer or designated winterization fitting. It is crucial not to exceed 80 PSI during this process—remaining below 50 PSI for poly pipe systems and under 80 PSI for PVC systems.
Homeowners should then activate each zone one at a time through their control panel, running the compressor until only misty air comes out of each sprinkler head. Once all zones are clear, opening test ports on the back-flow preventer allows any remaining water to escape. Afterward, users must depressurize and disconnect the compressor before loosening bolts and plugs on the back-flow unit to drain residual water.
A key safety note: improper execution can cause significant damage. “Now, I would not recommend you perform this service yourself unless you would consider yourself ‘handy’ and have experience with similar home service routines,” one industry professional stated. “Otherwise, if you have serviced your own pool, car, air conditioner units or like tasks, then this something you can totally do. But be advised, if this is not properly executed then you will sustain hundreds if not thousands of dollars in damage to your system.”
For those preferring expert help, platforms such as GreenPal provide access to local lawn care professionals who offer irrigation winterization services across various neighborhoods.
Optimal timing for blowing out irrigation systems is late fall—typically October or November—before nighttime temperatures drop below freezing and before any hard freezes occur.
Cost-conscious homeowners may consider renting a compressor for $50-$75 per day and sharing expenses with neighbors to reduce individual costs.
“Winterizing your irrigation system is essential for protecting your landscape investment from freezing temperatures,” said a representative from GreenPal. “You can do it yourself with a compressor or hire a professional for $60-$150.” They added that GreenPal’s network covers many neighborhoods nationwide.
If uncertain about performing these steps safely or correctly, experts advise hiring a professional to avoid potential damage.
