3-way valves, full port, 2", actuated?

Hola raincatchers, Hope you're getting what you need, as we just did in part today, long-awaited though in driving sheets & flooding overflows.  

Anyone worked with the above, and know how to get a dozen at lowest cost?  

We have a 12,000-gallon two-zone wet & dry gravity system: four 360 surge/ settling/ control tanks & two 5000 main; aim to go rain-water-only for our subsistence nutrition homestead horticulture; and are in its first calendar year of drought fallow (only regularly irrigating perennials, by whatever means necessary) during second water year of severe drought.  

Those valves at bottom will allow me to automate/ program soaker irrigation separately from each tank plus equalise tanks within zones, and at top to direct overflows to separate swale irrigation, opposite sides of first zone, from first to second zone, and from second to back of property.  

Happy to compare notes, especially with anyone in drylands going whole-year whole-site rain-water only.  

Thanks kindly, Patrik

Where are the valves you speak of?
Also look at the topic in my signature, it may help

Hello John, I don't have those valves yet, they're what I'm looking into & asking about, retail suppliers online $500-1000 each, meant for top & bottom tank outlets in San Diego, California, system has already been partly in use with manual ag valves & fittings, experience tells me I might find a more affordable approach, the ones I know (Jandy) come from pool systems (automated) & are often used for indoor gray-water diversions (manual).  

Can you send a photo, or good drawing, I am confused at the arrangement. I might be able to help.

We straddle a small canyon in a tight location, surrounded by trees & buildings, which won't convey in one photo or sketch easily.  

However it all essentially boils down to each of the two tank outlets could be switched between irrigation & connection:  

*bottom to either soaker hose irrigation, or wet equalisation connection with other tank(s)

*top (overflow) either to swale irrigation, or dry overflow connection to other tank(s)  

There are several affordable (<<$100) manual 3-way valves, but motor-driven (5-10x retail) is the key to automatic scheduling, remote control, and algorithmic integration with separate gray-water (backup when occupied) & conveyed-water (backup when away) systems.  

Well, I think I found the answer nearby at a local pool:

24V motor actuators which fit right over the Jandy three-way valves already in hand,
offered by the likes of Jandy, InterMatic, SuperPro,
available online & from pool & hot tub suppliers,
such that each port gets valve + electrical operation/ manual override for ~$200
plus automation & remote intervention through a programmable scheduling controller & wifi

the challenge now is to find/ assemble/ set up a control system able to integrate various sensors (tank level, soil moisture), local conditions (E-T), plus rain-, gray-, conveyed-water sources & function off-line, off-grid, on irrigation cycles between once a week, twice a month, and the length of a wet season