While the technician was very polite and professional, I believe I was oversold on the solution. I had a single zone stuck on, and the solution was ultimately to replace valves in all 7 zones at $175 each. It seems unlikely that all 7 zones failed at the same time. Given the parts required for the valve replacement are about $15 each and the time to replace is about 15 minutes, $175 is a hefty markup -- especially when it seems the technician was essentially guessing at my expense. Furthermore, now that zone 1 (the stuck zone) is working, it appears zone 1 has a broken pipe, as water is bubbling up through my patio right above what I believe is a zone 1 pipe. Given I have a broken pipe and mysterious valve failure, makes me wonder a bit if the blowout last season is somehow involved.
