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.

IdahoJoe

New Member

1

Wednesday, February 27th 2019, 1:23pm

Unusual feature needed in controller

I have and unusual requirement for a sprinkler controller and I'm hoping someone here can let me know if such a controller exists.

Water for my lawn is supplied from a local irrigation district. The water is delivered via a canal system. My specified time to receive water is 12 mid-night to 6 am each Saturday night during the irrigation season. However, there are many factors that can affect the delivery of the water. Water is usually available during my time slot, but no always. In addition, it is normally the case that some amount of water will get delivered to my property sporadically on Friday nights and during the day on Saturday. When water is delivered it flows into a cistern and I have a pump that then delivers the water to the sprinkler system. Power to the pump goes through a float switch so regardless of what the controller is set to, water is only delivered when the float switch indicates that water is in the cistern.

What I would like is a controller that allows me to set a duration for each zone, say 60 minutes. However, during the day on Saturday I might have water available for 15 minutes and then no water for the next 90 minutes. Then water again for 60 minutes. The controller needs to know that, in this example, zone 1 received 15 minutes of water and was then delayed. When the 2nd wave of water arrived for 60 minutes the controller needs to know to run zone 1 for an additional 45 minutes (for a total of 60 minutes) and then switch to zone 2.

An alternative might be a controller that regulates water by volume, not time. This would require a flow meter.

Does such a controller exist?

Thanks in advance for any and all advice.

Wet_Boots

Supreme Member

Posts: 5,298

Location: Metro NYC

2

Wednesday, February 27th 2019, 3:54pm

By the time you can jury-rig a control system that matches your needs, you might just as well install a larger cistern. Given time and materials, you could fabricate a control system, but off-the-shelf, not likely.

IdahoJoe

New Member

3

Thursday, February 28th 2019, 12:15pm

Thanks for the info Wet_Boots. Unfortunately because of space constraints a larger cistern is not an option and like you noted, I have not found any off the shelf controller with this capability.

One option I have is to get one of the open source controller software packages and modify it to meet my needs. That's a good bit of work and I was hoping to find a controller that meets my needs. Not looking good.

Thanks again for your input.

Wet_Boots

Supreme Member

Posts: 5,298

Location: Metro NYC

4

Thursday, February 28th 2019, 8:00pm

You have a start with a float switch. You can add a paddle switch to the line carrying the incoming water, so you have an indication of incoming flow. You can find an old working electromechanical controller like a Rainbird RC, and arrange for it to operate only when the pump is running, so it can intermittently give you the watering periods you set.

Controller, sensors, time switches, relays, transformers - at some point that bigger storage tank is going to look better and better 8|

Rate this thread