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Starting Member


Wednesday, February 16th 2011, 4:10pm

Controlling a pump relay from a zone terminal

Can I wire a pump relay to a zone on my controller without blowing up the controller? I am adding a 1.5 HP sprinkler pump to my irrigation system and the controller that I have does not have a master valve/pump control terminal. I figured I could run the wiring for zone one to the zone one valve and the pump relay. Any thoughts?

Thanks in advance!


Supreme Member

Posts: 493

Location: Seattle


Wednesday, February 16th 2011, 9:52pm

No You Can't.

Unless you are planning on using the pump to only irrigate zone 1.

The controller only sends power to the specified zone when that zone is running. If you hook your relay to a zone, it will only crank on when that zone is on. That's why the MV/Pump terminal is needed for a pump, it sends power to this terminal on every zone.

Your obviously spending some money on converting over, spend a tad bit more and replace your controller!
I personally Recommend these controllers

Depending on how many zones you have

Rain Bird ESPM 4M

Weathermatic Smarline SL1600 -2400

Hunter Pro C

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