Essential Steps to Winterize Your Sprinkler System

Understanding the Basics of Sprinkler Winterization

Winterizing your sprinkler system is primarily about removing water to prevent freeze damage. The process starts with identifying your water source and understanding the type of backflow prevention device installed. The two most common devices are the double check backflow assembly, typically located below ground or indoors, and the pressure vacuum breaker assembly, which stands about a foot above ground. Some older systems with atmospheric vacuum breakers may not have been designed with winterization in mind, often found in manual systems.

Assessing Your System's Design

To tailor a winterization plan, you need to know your system's layout. Key considerations include:

• The presence of a shutoff valve before the backflow assembly
• The existence of drain valves
• A fitting for connecting an air compressor's line

These factors will influence the best approach for winterizing your specific system.

Draining vs. Blowing Out: Choosing the Right Method

For many systems, simply draining the water is sufficient to prevent damage. However, in some cases, using compressed air to blow out the system is the better option. Begin by turning off the water at the source, which is usually a manual valve located before the backflow prevention assembly. Some systems may have a 1/2" drain valve just after the backflow device; if so, check for additional valves in other valve boxes.

If your system has drain valves, opening them should adequately protect it. If not, and the backflow is the lowest point, opening the test cocks of the backflow may suffice. When using compressed air, if there's no dedicated fitting for the compressor's line, you can connect to the first test cock downstream of the shutoff and cycle through all zones to expel most of the water.

Caution When Using Compressed Air

It's worth noting that some experts advise against blowing air through the backflow assembly, as it can potentially damage the seals. However, many professionals, with decades of experience, have not encountered issues with this method.

Minimizing the Risk of Damage

While no winterization method can guarantee complete protection, following these practices can significantly reduce the likelihood of facing extensive repairs each year. It's a proactive step that can save homeowners time and money in the long run.

Interesting Statistics and Facts

• According to the Environmental Protection Agency, as much as 50% of water used for irrigation is wasted due to evaporation, wind, or runoff, often caused by inefficient irrigation systems and methods. Proper winterization can help maintain system efficiency.
• A study by the Irrigation Association suggests that regular maintenance, including winterization, can reduce irrigation water use by 15 to 20 percent.

By taking the time to winterize your sprinkler system, you're not only protecting your investment but also contributing to water conservation efforts.