Sprinkler System Antifreeze Loop: Protect Your System During Winter

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As the winter season approaches, it’s important to protect your sprinkler system from the freezing temperatures. One of the best ways to do this is by installing an antifreeze loop. In this article, we’ll explain what a sprinkler system antifreeze loop is and why it’s important.

What is a Sprinkler System Antifreeze Loop?

A sprinkler system antifreeze loop is a closed-loop system that circulates antifreeze through the pipes and sprinkler heads of your irrigation system. The antifreeze prevents the water from freezing and expanding, which can cause pipes to burst and sprinkler heads to crack.

Why is it Important?

Without an antifreeze loop, your sprinkler system is at risk of damage during the winter months. As water freezes, it expands and can cause pipes and sprinkler heads to crack or burst. This can lead to costly repairs and a disrupted irrigation system come spring.

How does it Work?

An antifreeze loop is typically installed in the mainline of your sprinkler system. The loop consists of a pump, a heat exchanger, and a reservoir that holds the antifreeze solution. When temperatures drop below freezing, the pump circulates the antifreeze through the loop, preventing the water in the pipes from freezing.

What Type of Antifreeze is Used?

The most common type of antifreeze used in sprinkler system antifreeze loops is propylene glycol. This type of antifreeze is non-toxic and safe for the environment. It’s important to use a high-quality antifreeze that is designed for use in sprinkler systems.

Benefits of a Sprinkler System Antifreeze Loop

Installing an antifreeze loop in your sprinkler system has several benefits. It protects your system from winter damage, reduces the risk of costly repairs, and ensures that your irrigation system is ready to go when spring arrives.


Installation of an antifreeze loop should be done by a professional sprinkler system technician. The loop must be designed and installed to meet local codes and regulations. Improper installation can lead to system failure and property damage.


Regular maintenance of your antifreeze loop is important to ensure that it continues to function properly. This includes checking the antifreeze level, testing the pump, and inspecting the system for leaks or damage.


Installing a sprinkler system antifreeze loop is an important step in protecting your irrigation system during the winter months. It’s a simple and effective way to prevent damage and ensure that your system is ready to go when spring arrives. Be sure to have your loop installed by a professional and to schedule regular maintenance to keep it functioning properly.