meatmechdriver t1_itm3670 wrote

Reply to comment by hclear in Winterizing Sprinklers by Dimerien

Whoever installed my system was gracious enough to add an air hookup downstream of the sprinkler cutoff. I have a 7 gal-ish compressor to which I add an expansion tank for extra volume. I do the same routine - 70 or so psi, cycle zones until I see no water or only fine mist come out of the heads, letting the compressor catch back up each cycle.