Locate the manual drain valves situated downstream of each zone valve. Turn off the water supply by closing the main valve to the sprinkler system. Open all the manual drain valves for each zone in the system , and leave them open so that all the water drains from the pipes and sprinkler heads. Once the water has drained out of the mainline, open the boiler drain valve or the drain cap on the stop and waste valve (whichever is used in your area) and drain all the remaining water that is between the irrigation water shut off valve and the backflow device.
Open the test cocks on the backflow device. Here are some tips from Rain Bird on how to prepare your irrigation system for winter. There are several ways to drain your pipes: a manual drain valve, . There are three basic methods for draining leftover water from your irrigation system. Which method you should use will depend on the type of irrigation you . Ryan will show you how to drain your sprinkler system so that you do not have to worry if there are a few.
An instructional video on how to drain your backflow and irrigation system in preparation for freezing. Get your self- draining underground sprinkling system ready for winter! For more home repair how-tos, home. Step by step guide on how to quick drain a sprinkler system.