Endless debate and opinion not necessarily fact. As far as irrigation, perhaps a better term is lawn watering. In the older sections they use the regular drinking water. In newer sections it is recycled water-not fit to drink. I think everywhere the water from the hose bib is normal drinking water. There have been several threads on whether the recycled water is safe on plants you are going to eat-fruits and veggies. Truth-I don't know.
Everyone has two watering days. I think the reason is so that you and your neighbor are not watering on the same day.
We all have a float valve kind of thing that is supposed to shut off your automatic sprinkler if it rains. They have a limited life. Repair means replacing it. I expect few of the are working and since the sprinklers are or should be run a night to lessen evaporation
few know that it isn't working.
Some people have decided the must water everyday. That is contrary to good lawn care.
It makes for lazy grass. The roots have no reason to go deep in search of water. So one day without water and your lawn will brown out. Water and fertilizer also need to be in balance. The bag says 5,000 sq feet. My lawn deserves better. I will apply twice that.
Result is your lawn needs more water, needs to be mowed more often and is more subject to fungus and insect damage.
Time to run each zone? That is the wrong question. If, you have an assortment of heads they put out different amounts of water per minute. What you should do is put many shallow cans around you lawn and measure the true amount of water being applied.
Cleaned tuna or cat food kind of cans work great for this.
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