This link has been bookmarked by 5 people . It was first bookmarked on 14 Apr 2007, by Bill H.
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14 Apr 07
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Rain Sensors? There is not much to do to prepare the rain sensor for the winter months. If your sensor is the type with a cup or bowl that catches water, you might want to remove the water and place a plastic bag over the sensor.
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he blow out method utilizes an air compressor with a Cubic Foot per Minute (CFM) rating of 80-100 for any mainline of 2" or less. These types of compressors can be rented at your local equipment rental yard. The compressor is attached to the mainline via a quick coupler, hose bib or other type connection, which is located after the backflow device. Compressed air should not be blown through any backflow device. To start the "blow out", shut off the irrigation water supply and, with the compressor valve in the closed position, attach the air compressor hose to the fitting.
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Use when automatic drain valves are located at the end and low points of the irrigation piping. These will automatically open and drain water if the pressure in the piping is less than 10 PSI. To activate these, you shut off the irrigation water supply (shut off will be located in the basement and will be either a gate/globe valve, ball valve or stop and waste valve - see drawings below) and activate a station to relieve the system pressure
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Use when manual valves are located at the end and low points of the irrigation piping. To drain these systems, simply shut off the irrigation water supply (shut off will be located in the basement and will be either a gate/globe valve, ball valve or stop and waste valve - see drawings below) and open all the manual drain valves.
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three types of water removal in mind: manual drain, auto drain, or blowout. If you don’t know your system type, it would be best to use the blowout method.
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Polyethylene pipe (flexible, black pipe) is used in many freezing climates.
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18 Nov 06
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