I have air fittings in the valve supply lines. In the fall I turn off
the water supply, hook up an air compressor, and let the sprinkler
system controller cycle compressed air through each zone for a few
minutes each.
Here, no freeze problem. But we lay out the system on top of the ground
first, to see if it actually does the job. Before doing that, seemed to be
missed areas.
That's a good thing to ask an estimator about. Thanks!
Say it ain't so.....
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