Turn off your water at the dedicated Sprinkler Line Shutoff (A) in your basement / crawlspace. During our flushing procedures we add a safety factor of 2. Emitters can also be installed at low points to assist with draining. 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. 2. Ordinary wear and tear or contaminated water can potentially block the nozzles. If your irrigation lines start at a sillcock (spigot), the hose end that screws onto the sillcock is an excellent point. Another common method is to blow out the lines using compressed air. Flush valves will open every time the system shuts off, draining water trapped in the line. How to Flush Out a Drip Irrigation System. You didn't specify that the pressure in the line should NEVER exceed 50psi. If you have a more elaborate irrigation system, find a suitable blow-out point such as … This can be a significant difficulty, which may prevent you from getting your plants properly fed and watered. Since water expands as it freezes, draining the system before cold weather strikes ensures that the pipes won't burst. Then, turn on the water to force it through the line to clear it. If you have a long irrigation pipe in your back yard, then it may be very annoying when it starts to become clogged. Blowing out the Lines. To move a sprinkler system line, we must first locate its origin. When you blow the system out, the heads should stay UP for the entire 5 min. 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. Otherwise, debris will breach the system and block the nozzles. Look for the screws holding them in place and unscrew them with a screwdriver. Within your sprinkler system, there are a set of valves that controls each sprinkler line. Any segment of pipe less than 300 feet will be flushed for a minimum of 1 minute. You are not doing a proper blow out. Keep your system clean and clear of clogs by flushing it with water at least 3 times a season. 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. Flush the Sprinkler System. The next action is to flush the pipes to find, identify, and clear foreign materials. Protocols that describe specific steps for pre-testing wet and dry sprinkler systems before flushing begin with an inspection of the exterior system parts: the pipe, hangers, and sprinkler heads. I am replacing my valves and want a clean start. The air should flush out of the system within a few minutes. Make sure to have a bucket available for water drainage. 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. Flush all the water from the system to avoid damaging pipes and fixtures. I have seven zones on a deep well. Flush Valves can be installed at low points in the line to assist with draining the system. If they sink back down, you don't have enough volume available to hold them up. Thanks for any input. 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. Draining a little water may not be enough to prevent pipe rupture. Should I do each head or just the furthest one. That compressor cannot produce enough air to properly flush the lines. Those valves are typically housed in a plastic box below ground, typically identified by a round green plastic top. Locate the Origin of the Line. 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