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Sunday, July 23rd 2017, 7:06am
by DerStig
I thought I already answered this. You're doing a good thing with using sch 40 PVC between the RPZ and the manifold. None of the pressures you have listed present a threat to the sprinkler system.
Master valves (two of them) should work with your Rachio controller, which lists an output current capability of 1.3 amps. Nearly any common electric valve you could choose nowadays will have a solenoid with an inrush current of 0.4 amps or less, so two master valves and one zone valve being activated simultaneously gets you a top inrush current of 1.2 amps or less.
With the plumbing you intend to install, the master valve(s) would no longer be about protecting plumbing so much as being insurance against a stuck-open zone valve. If it happens your zone valves have flow controls, you can increase their reliability by partially closing the flow controls.
Saturday, July 22nd 2017, 9:43am
by Wet_Boots
Saturday, July 22nd 2017, 7:59am
by DerStig
Thursday, July 20th 2017, 6:27am
by DerStig