i ran into one of these a few years back, or something very similar anyway. if nothing else, it definitely made the inside of the well and drop pipe disgusting. they say it wont make your pump run, but what happens when a well owner runs water from a faucet? the one i seen, the pump cycled every few minutes. dont think it would be too good for your csv systems valveman, unless you like the idea of 1 very long expensive cycle.
not saying its useless, but i wasnt impressed. well cant be sealed, right? would think it would need to breath to work, but i dont know. also, how about the snifter/micronizer setups you sometimes see just for light sulfur... you know when you tilt the old holding tank over and see what comes out of the bottom. looks like with this setup, all of that now accumulates inside the well.