View Full Version : Updating a 24V sprinkler controller

04-16-2001, 11:05 AM
I am a homeowner, and the house I just bought has an old controller (may be a historical item) that I understand is 24 volts. It is now fully manual, as the automatic features no longer work. I would like to update it with a new controller.

What is involved in changing from 24V to 12V systems?

Is there a lawn sprinkling forum out there that may have specialists in that area?


04-16-2001, 04:39 PM
Modern irrigation systems are 24 VAC. There is nothing wrong with an older mechanical controller. Sometimes they just blow a fuse and you need to replace it. I would get it cheaked out before running out to buy a new one. Unless you have a low volume system, which requires varied and often multiple starts. I would reccomend a mechanical controller, they tend to have fewer problems than their electronic counterparts.
Good Luck,
Jim L

04-17-2001, 02:12 AM
As Jim said, All modern timers are 24 Vac just like your old one. This is a job that would be pretty easy since you have all your wireing already in place. It's just a matter of swapping the clock. I would guess since it's a mechenical type, you only need a single program timer. A dual progam type timer would be needed for example, you want to run your lawn irrigation on a Mon, Wed Frid, type schedual and your drip irrigation on a tues, Thur, Sat. schedual. Home Depot carries a simple electronic timer (WaterMaster) that I use in my home installations for around $25. I wouldn't get a fancier timer than you need. There are so many out there to choose from. Some Brand names that I would consider: Toro, RainBird, Irritrol, Hardie are just a few brands to mention. Just keep it simple.

I do like electronic timers vs. mechanical. Simple reason is electronic timers tend to be more accurate than mechanical timers.