Master control valve

Have a Rachio R3e. Can app independently turn MC valve on and off?
Converting system from manual to automated. Want the ability to turn off MC valve to check pressure and add wster sipgot in bavkyard.

@SingleDad - TLDR - No.

When the master valve option in the application is enabled, then every time a zone is run the master valve is activated. If there is an unused zone terminal in the Rachio, one can assign a phantom/non-existent zone to it and run that zone to turn on the master valve.

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