Orbit 12 station timer

I'm pretty sure the device itself only allows one valve to be open at a time, I don't know if it shuts down the existing open valve when a new one is requested to be open, or if it just ignores the command...

Thanks, I'll have to experiment and see what happens.

only one valve will open at a time.

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I'm having the same problem someone else wrote about. I put together a routine to control my sprinklers. When it executes, everything executes at once and the last command is the only one that works. All of my valve default to 20 minutes. I'm shooting for 8 minutes run time and 5 second delay as was suggested. Attached are my commands. Thanks in advance,
image !

This is why:

I used this rule way back when. It worked. You can see the difference in the delay part.