Galcon Alternator Valve

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  • Nelson - Jun 15th 2020

    Galcon Alternator

    The Galcon alternator is good....when it works. I shop with Dripworks all the time and love everything they sell. However, if I am going to be honest, I have had to replace the alternator once a year for the past 4 years as it breaks or does not work after a years time.

  • Susan - Apr 25th 2020

    I love this thing! 5 stars!

    I have a large garden that is divided in quadrants. Paired with a timer, it is easy to irrigate one side and then the other without lifting a finger.

  • Nancy - May 15th 2019

    Very useful item

    I love the function of this alternator valve -- it allows a single outlet timer to alternate sending water to one system on one cycle and another system on the next cycle. You can also manually switch it if you just want to test it. I had a little trouble when one blew apart, but Dripworks replaced it right away. It may have been cracked in assembly, but the others I have continue working just fine. The literature says it can handle up to 120 psi, but a pressure regulator may be a good idea. I love that it's simple, operates on water flow alone, and effectively turns a single outlet timer into a dual outlet timer. I have the timers set to water one system one day and another the next, but you could program your timer to water both systems in the same day just by having it operate twice a day.

  • Colorlicious Landscaping - Aug 25th 2017

    Galcon Alternator Valve

    It works great and best part is that it runs on water pressure and does not reduce pressure much at all. Downside is overtime it starts to leak and I am not sure if the valve closes completely as I am now getting constant leaking from it down the line. So I had to get a replacement valve after about 2 yrs

  • John Blackwell - Mar 6th 2014

    Alternator Valve

    Most game changing item in my garden. Works every time. Gives me ultimate flexibility to run water under pressure further. Saves water under California drought conditions.

  • John - Jan 8th 2014

    As advertised

    Works great Going to order some more

  • Walter - Aug 14th 2013

    Poorly constructed

    Lasted less than 2 weeks here on the farm. Began sporadically not switching over, then after another week quit working altogether.


Don't buy another expensive timer or build a complex manifold! Simply attach our hose threaded Galcon Alternator Valve to your spigot or timer to instantly double coverage of your drip irrigation system.


  • Outlet switches with each timer cycle
  • Rugged, impact-resistant construction
  • Ideal for remote applications
  • Female hose thread inlet and male hose threat outlets

This Alternator Valve is not a timer, and does not require batteries or a power source. It is simply powered by the water moving through it. Place the Alternator Valve downstream of a timer or valve and it will alternate the water flow from one outlet to the next with each timer cycle. It is a simple, inexpensive solution to double the coverage of your drip irrigation system.


  • Allows flows up to 6 gallons per minute per outlet
  • Operates in a pressure range from 14 to 140 PSI
  • Low friction polymer construction
  • Flow switches from outlet 1 to outlet 2 with each timer cycle
  • Allow one minute of "recovery" time between timer cycles

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