Preparing Your System for Winter
Winterizing your sprinkler system is a necessity because water in the underground lines, valves and heads must be void of water or damage to any part of your system could result. Do not trust manual or automatic drain valves.
To properly winterize your system it should be blown out with pressurized air. To determine the best size of compressor for your system, the gallons that flow thru each zone must be taken into account. Any water left in the system prior to the winter season may result in a costly repair bill in the spring – such as for irrigation lines, fittings, valves, pumps, sprinklers heads, backflow and others miscellaneous items.
Rule of thumb: If the sprinkler head stays up after the water is blown out and compressed air continues to flow through the system, you are using the propertly-sized compressor. If your system has a pump, for example if it pumps water from a lake or other body of water, the pump should be drained and stored inside.
Final thought and warning: It is important to remember that it is much less costly and labor intensive to property and efficiently prepare the system in the fall, prior to the winter season.