Home Grown


Tips and resources for farmers and gardeners




Winterizing Irrigation Systems

Once the first frost of autumn arrives, it's time to think about properly winterizing outdoor pipes and lawn sprinklers. A few precautions now can save a lot of time, money and headaches later.

Freezing temperatures can cause the water in an exposed pipe to expand. If the water expands too much, the pipe bursts.





"With home irrigation systems, you probably wouldn't know you had any pipe damage until you turned it on for the first spring watering," said Kerry Harrison, a University of Georgia Cooperative Extension irrigation specialist.

Most in-ground sprinkler pipes will be okay. Only the top few inches inches of the ground will freeze in most areas, and pipes should be installed well below this level.

Other irrigation components, such as backflow-prevention valves, are at ground level, though, and could be in danger.

If any exposed valves or pipes are around your home, tape them up or "use a good old sack to wrap them," Harrison said. Home improvement stores have many tapes, foams and gadgets to keep these pipes warm on cold, winter nights.

The tips of sprinkler heads can hold water. When frozen, they can rupture. The whole sprinkler system holds water, too, even when it isn't being used. Don't forget to drain the system, Harrison said. If you don't drain it properly in the winter, your sprinkler could be a geyser when you turn it on next spring.

"Arrangements should have been made in the installation process to have a way to drain those lines that would hold water through a buried valve in a pit," he said.

If you bought a home with an installed irrigation system, find this drain valve. Some systems are equipped with automatic drain valves.

Don't forget about outside water hoses. Just do one of two things:
  • Leave the hoses hanging outside. But disconnect them from faucets.
  • Disconnect, drain and store hoses someplace with a constant temperature. This will prolong the life of the hoses.
If you leave hoses undrained outside in the winter, don't move them or touch them in freezing weather. Frozen hoses are fragile. You could be the one to break them.

Private water users and rural residents with wells should check out their main water pump. Usually a quarter-inch pipe connects to the pressure switch. If it's metal, it likely won't freeze. But if it's plastic, it might freeze and burst. This could cause the water pump to fail or continue to run and cause some major winter repairs.

If all these precautions fail and a pipe bursts anyway, there's still one thing to remember: "Know where your main water cutoff is," Harrison said..

Source: The University of Georgia College of Agricultural and Environmental Sciences

 
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