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When Should I Winterize My Lawn Sprinkler System?

As the fall season blows in, it is once again time to start thinking about winterizing your lawn sprinkler system! Lawn sprinkler winterization, also known as sprinkler shut down, fall closing, and winter blow out is the process of preparing your irrigation system for the cold winter months. The winterizing process will help to assure that the coming winter and freezing temperatures do not damage or compromise your sprinkler system’s components and piping.

The most popular question we get year after year is “When should I winterize my sprinkler system?”. October 1st thru December 15th (temperature permitting) is the optimal time window to winterize your irrigation system! While the weather plays quite a big role each year in determining when clients want to winterize their system, we strongly recommend winterizing your system during this time frame. The reason is because you want to winterize your sprinkler system BEFORE we experience several days of freezing cold temperatures, specifically below 32 degrees Fahrenheit. When temperatures drop below freezing, the water left inside in your sprinkler irrigation lines can freeze and cause extensive damage. Even if you have drained the water out of your irrigation system, some water will remain and can freeze, expand, and crack the PVC piping if your sprinkler system is not professionally winterized.

The second most popular question we get during the winterization season is “What exactly does Pacific do to winterize my sprinkler system?”. You are in good hands with Pacific Lawn Sprinklers’ team of professionals! All of the people on the Pacific Service Team are trained in the proper procedures to winterize any size underground lawn sprinkler or drip irrigation system. We will shut down all of the irrigation water supply sources and leave your clock in the “rest” position. A specialized air compressor paired with a regulator will then deliver the precise amount of compressed air (based on manufacturer specifications) that will correctly remove the residual water in all of the systems’ main lines, lateral lines, manifold and solenoid valves. The regulator eliminates over-charging a sprinkler line or drip line with too much air at one time. When properly performed, the sprinkler heads, solenoid valves and piping will not be compromised by excess pressure or friction by an improperly regulated air compressor. Your system is now ready with withstand the cold winter months!

Have we answered all of your questions, and are you ready to schedule your lawn sprinkler winterization? Pacific Lawn Sprinkler’s Service Department is ready to schedule your appointment! Please schedule an appointment conveniently online at or give us a call at 888-438-7224. And remember, with Pacific, there is NEVER a contract and NEVER a prepayment! We simply offer pay as you go service. Further, all of the service appointments provided by Pacific will be backed by our “ON TIME OR ON US” guarantee. We will be there when we say we will, or we pay you! We look forward to seeing you this fall!

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Pacific Lawn Sprinklers