During our flushing procedures we add a safety factor of 2. If too much water remains in your sprinkler lines, then that water will freeze, and the resulting expansion can break the plastic lines laid below the ground. If you have a more elaborate irrigation system, find a suitable blow-out point such as … Flush valves will open every time the system shuts off, draining water trapped in the line. I am replacing my valves and want a clean start. If your irrigation lines start at a sillcock (spigot), the hose end that screws onto the sillcock is an excellent point. Should I do each head or just the furthest one. If they sink back down, you don't have enough volume available to hold them up. You are not doing a proper blow out. We would flush 2,500 feet of pipe for a minimum of 9 minutes. If you have a long irrigation pipe in your back yard, then it may be very annoying when it starts to become clogged. How to Flush Out a Drip Irrigation System. To flush the lines with water, plug all of the emitters, which are the holes in the tubing, so the water can’t escape through them. 2. The air should flush out of the system within a few minutes. When you blow the system out, the heads should stay UP for the entire 5 min. Those valves are typically housed in a plastic box below ground, typically identified by a round green plastic top. That compressor cannot produce enough air to properly flush the lines. Make sure you flush the initial point of the system to avoid clogging. Then, turn on the water to force it through the line to clear it. Look for the screws holding them in place and unscrew them with a screwdriver. Most sprinkler systems are not buried deep enough to protect them from freezing. Locate the Origin of the Line. Emitters can also be installed at low points to assist with draining. Any segment of pipe less than 300 feet will be flushed for a minimum of 1 minute. Another common method is to blow out the lines using compressed air. Make sure you flush the system at the beginning of the season. Flush the Sprinkler System. Ordinary wear and tear or contaminated water can potentially block the nozzles. What is the best way to flush out a sprinkler system. Open the 2 Petcock’s (F) with a flat head screwdriver so that the screw head runs a 45 degree angle; Open the Inside Drain (B) to drain your system. Thanks for any input. Blowing out the Lines. Pop sprinkler heads off of water irrigation lines that run out into the yard to speed up the velocity of the water running through circuit lines. I have seven zones on a deep well. A garden sprinkler system makes maintaining a yard much easier, but you do have to take care to drain them of any remaining water come late fall if you live in an area with cold winters. Keep your system clean and clear of clogs by flushing it with water at least 3 times a season. To move a sprinkler system line, we must first locate its origin. Draining a little water may not be enough to prevent pipe rupture. Flush all the water from the system to avoid damaging pipes and fixtures. Otherwise, debris will breach the system and block the nozzles. Since water expands as it freezes, draining the system before cold weather strikes ensures that the pipes won't burst. In order to correct this problem, you will need to unclog the pipe using natural agents. Make sure to have a bucket available for water drainage. Once the required flushing duration is achieved, we verify that the water stream is clear. Within your sprinkler system, there are a set of valves that controls each sprinkler line. Turn off your water at the dedicated Sprinkler Line Shutoff (A) in your basement / crawlspace. 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