master on/off adjust

[ramblinwreck]

Hi,

Does anyone have any practical input/suggestions on how to use the master valve on/off adjustment? Is the idea that you don’t touch these (leave them on zero) unless you have a water hammer problem you’re trying to solve, or a pump that needs to start early?

I’ve got a rather ordinary Hunter irrigation system (Pro-C controller), and I’ve no idea if it applies any sort of adjustment at all, and if it does, how much it is. I’ve got a Master Valve and ordinary irrigation zones. Do I need to touch the master on/off adjustment at all? The tinkerer in me thinks it would be ‘safest’ to set Master On Adjust to +1 and Master Off Adjust to -1 to minimize the stress to the pipes to the sprinkler heads, but I really don’t know. Any disadvantage to doing that?

Looking for feedback and/or guidance on best practice here.

Thanks
Chris

[Ray]

The on/off adjust are normally left as zero (the default values). You are right that these parameters can be used to fine tune water pressure / reducing hammering problems. I frankly don’t know what are the rule-of-thumb values. I think (I am not an expert on this topic 🙂 controllers that do not provide this as an option just use zero.

[ramblinwreck]

Thanks for the reply. Got the OS controller installed this weekend everything is working well with these options left as zero (default). I won’t mess with success. 🙂

[Author]

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