You didn't specify that the pressure in the line should NEVER exceed 50psi. If they sink back down, you don't have enough volume available to hold them up. Flush all the water from the system to avoid damaging pipes and fixtures. Emitters can also be installed at low points to assist with draining. In order to correct this problem, you will need to unclog the pipe using natural agents. When you blow the system out, the heads should stay UP for the entire 5 min. If you have a long irrigation pipe in your back yard, then it may be very annoying when it starts to become clogged. 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. That compressor cannot produce enough air to properly flush the lines. Draining a little water may not be enough to prevent pipe rupture. What is the best way to flush out a sprinkler system. Make sure you flush the initial point of the system to avoid clogging. Another common method is to blow out the lines using compressed air. Those valves are typically housed in a plastic box below ground, typically identified by a round green plastic top. The next action is to flush the pipes to find, identify, and clear foreign materials. We would flush 2,500 feet of pipe for a minimum of 9 minutes. 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. 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. 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. Ordinary wear and tear or contaminated water can potentially block the nozzles. The air should flush out of the system within a few minutes. To move a sprinkler system line, we must first locate its origin. Flush the Sprinkler System. 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. Otherwise, debris will breach the system and block the nozzles. 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. You are not doing a proper blow out. I am replacing my valves and want a clean start. Make sure to have a bucket available for water drainage. Blowing out the Lines. If you have a more elaborate irrigation system, find a suitable blow-out point such as … Look for the screws holding them in place and unscrew them with a screwdriver. Locate the Origin of the Line. Then, turn on the water to force it through the line to clear it. This can be a significant difficulty, which may prevent you from getting your plants properly fed and watered. 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. Thanks for any input. Within your sprinkler system, there are a set of valves that controls each sprinkler line. Keep your system clean and clear of clogs by flushing it with water at least 3 times a season. During our flushing procedures we add a safety factor of 2. Most sprinkler systems are not buried deep enough to protect them from freezing. I have seven zones on a deep well. How to Flush Out a Drip Irrigation System. Flush Valves can be installed at low points in the line to assist with draining the system. Flush valves will open every time the system shuts off, draining water trapped in the line. Once the required flushing duration is achieved, we verify that the water stream is clear. 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