By John Geiger
To avoid major problems from a hard freeze – yes, we do get those here – it’s critical to winterize your system properly, not just the backflow preventer. Here’s how.
1. Turn Off the Water Supply
Locate the main water valve for your sprinkler system and shut it off.
If your system has a backflow preventer, turn it off as well.
2. Drain the System
There are three main methods to remove water from your system:
Manual Drain:
Locate the drain valves on your system and open them to release the water.
Start with the valve furthest from the water source and work your way back.
Automatic Drain:
If your system has automatic drain valves, these will open automatically once the water pressure drops. Check your owner’s manual for details.
Blow-Out Method (Best for Thorough Drainage):
Attach an air compressor to the blow-out port.
Slowly increase the air pressure (do not exceed 50 PSI for PVC pipes or 80 PSI for metal pipes) and blow the water out of each zone, one at a time.
Cycle through all zones until no water is left in the system.
CAUTION: Use the blow-out method carefully. Excessive pressure can damage your pipes or sprinkler heads.
3. Drain and insulate your backflow preventer
This is essential. Here’s how. Winterizing your sprinkler system, irrigation system backflow freeze prevention
4. Shut Down the Controller
Set your sprinkler system controller to the “off” or “rain mode” setting to avoid accidental activation during the winter.
5. Check for Repairs
Inspect your system for leaks or damage and address any issues before winter. It’s easier to repair in mild weather than in freezing temperatures.
By taking these precautions, your sprinkler system will be ready for any unexpected Texas freezes while staying in great shape for spring! Let me know if you’d like any clarification.
