Florida Freeze: How to Protect Pipes & Irrigation from Cold Weather

Central Florida is bracing for an unusually cold weather event, with temperatures forecast to plummet into the low 20s overnight Saturday. This cold snap, occurring for the first time in roughly 15 years, poses a threat to both property and vegetation across the region.

Preparing for the Freeze

The anticipated temperatures are low enough to cause significant damage. Plants are particularly vulnerable, and the cold is capable of killing them. Beyond the garden, the freeze also presents risks to infrastructure, potentially draining car batteries and even causing pipes to burst – including those in underground sprinkler systems.

Did You Know? Temperatures are expected to dip into the low 20s overnight Saturday, a level of cold not seen in Central Florida for approximately 15 years.

Protecting Your Irrigation System

Homeowners have several options for protecting their irrigation systems from freezing. One method is a manual drain, which involves shutting off the water supply and opening valves at the lowest points of the piping to release excess water. It’s also important to drain the backflow device and, if present, raise sprinkler heads with check valves to allow for drainage.

Alternatively, systems equipped with automatic drains will activate when water pressure drops. To initiate this process, the water supply must be turned off, and a sprinkler head briefly run to relieve pressure. However, even with automatic systems, draining water between the shut-off valve and the backflow device may still be necessary.

The Blow-Out Method

A third, more complex method involves using compressed air to force water out of the pipes – known as a “blow-out.” This method requires an air compressor rated at 80-100 CFM and a properly fitting coupler. However, it is potentially hazardous and can damage the system or cause injury if not performed correctly. Consulting a professional is strongly advised for those unfamiliar with this technique.

Expert Insight: Protecting irrigation systems from freezing is crucial to avoid costly repairs and ensure functionality once temperatures rise. The blow-out method, while effective, carries inherent risks and should only be attempted by those with the proper equipment and experience.

When using the blow-out method, safety glasses are essential. The process involves connecting the compressor, finding the highest and farthest sprinkler station, and gradually increasing air pressure while monitoring for water discharge. Precautions include not exceeding 80 PSI for PVC piping or 50 PSI for polyethylene piping and avoiding standing near active sprinkler heads.

Frequently Asked Questions

What can freezing temperatures do to my plants?

The freezing temperatures are capable of killing plants.

What are the three methods for draining an irrigation system?

The three methods are manual drain, automatic drain, and blow-out.

Is the blow-out method safe for all homeowners?

The blow-out method is potentially hazardous and should only be attempted by those comfortable working with compressed air or by a professional.

As the region prepares for these frigid conditions, homeowners are encouraged to take preventative measures to protect their property. What steps are you taking to prepare for the cold weather?