You are not logged in.

Dear visitor, welcome to SPRINKLER TALK FORUM - You Got Questions, We've Got Answers. If this is your first visit here, please read the Help. It explains how this page works. You must be registered before you can use all the page's features. Please use the registration form, to register here or read more information about the registration process. If you are already registered, please login here.


Active Member

Posts: 27

Location: New Zealand


Thursday, October 3rd 2019, 3:40am

Errant Zone Valve

I have an oddity valve that won't shut off the zone when the controller program concludes as programmed on a weekly timer operation.

What's worse, there are two valves on that controller connector. T'other zone shuts off, as programmed.

1) I've run the program manually and both zones / valves shut off, as programmed;

2) I've run the single station manual option and both zones / valves shut off, as programmed.

The valve does shut down when the controller dial is manually changed to "OFF."

I have no / limited experience in this sort of esoteric problem.

Any suggestions, please?

Irritrol (Toro) 12 station controller and 3/4" Hunter valves.



Posts: 2,552

Location: USA


Thursday, October 3rd 2019, 2:41pm

I had a guy just this week with a similar story which didn't make sense.
Turns out there was a pebble inside the valve keeping it from shutting off. Sometimes it shuts off, sometimes it doesn't.
I'd rebuild the valve and see if the problem goes away.

When the valve is stuck on, is the controller sending it a signal? That seems impossible because only one of the two combined valves is on. That's why it doesn't seem possible that it just shuts off when you turn the controller off.

Rate this thread