Has anything changed with the way the master valve operates on Gen 2?
Here’s the situation: Ran all last season with Gen 1 and everything worked beautifully. This season, however, I upgraded to Gen 2 controllers and now have a horrible water hammer problem, even with the Water Hammer setting enabled (and I use a Flex schedule). Other point to note is that the irrigation water branches off our incoming main before a pressure regulator that helps restricts house pressure (to ~50 PSI). Here are my questions:
When the water hammer setting is not enabled, as the Rachio switches from zone to zone does it open and close the master valve, or is it “smart” and leaves the master valve open? In other words, leave the master valve open until the entire schedule is complete and just open/shut the zone valves?
When a zone finishes running, does Rachio shut the master valve and the zone valve at the same time? Or does it shut one before the other? Would that help the hammer?
One of the suggestions I’ve seen online is to order the zones from highest to lowest volume. Has anyone tried this and found that it works?