OK, the stormy ol' brain has another idea on which I solicit ideas from the Boiler Room's hive mind-- others, far more experienced than me, have noted and actually applied and made work the idea that some pumps work remarkably well as turbines, and that some motors work remarkably well as generators when hooked to some appropriate pumps running backwards as turbines. A retired minister in southern VT did this in the late 70s (with the active help of Steve Kleinschmidt, whose name now adorns one of the primary hydro consulting firms in north america) and wrote a great book about it that I read about a year ago- I forget the title, but could find it if it matters. He actually entered into a special contract with his utility, VT Electric Co-Op to do "net metering" _way_ before that idea was even a glimmer in anyone else's eye. So- recently, looking at some literature given me by a friend who is in the HVAC wholesale trade, about some of the newest barely-in-north-america permanent magnet/ intelligent circulators, and seeing a cross-sectional diagram of all of their details of carefully-designed volutes and high efficiency pump rotors and rare-earth magnet motors-- and since my household water comes from a gravity flow spring that pushes about 1.5 gallons per minute through a pipe through my cellar, round the clock- year round- I got to thinking- why couldn't I maybe "back-hack" a permanent magnet circ, deleting the electronic controls, as a "pico hydro" turbine/ generator obviously, I am in the single-digits-of-watts- not kilo-or-megawatts category here, but if it makes reliable power, even if small, some substantial portion of 24/7/365 (except when the house is drawing water) with no substantial investment in a dam or pipe, then this could be the reverse of the "ghost load" that we all read about of various appliances that draw substantial KWH, over time, even as they sit dormant. and yes, I'd need to rectify/ store/ invert the "pico hydro's" varying electrical output in order to make it useful for anything, but I already understand that, and that is actually getting simpler and simpler, and cheaper with some of the smarter and smarter inverter technology that is emerging for small wind applications Ideas, reactions, constructive critiques, sources, contacts, or ideas on any of the euro PM motor circ makers, importers, distributors, etc., who might donate a carcass of a pump plus permanent magnet motor, without brain, for me to hack around with to try this? Thanks!