My DME supplied me w/what appears to be the Cadillac of O2 regulators...Bonsi Velocity Conserver {about $200}. I would like an extra one, because I leave my tank in the car. It would be nice to have one in the house. Amazon has regulators for $20, but as I study them, O2 is constantly flowing at from 1 - 15 LPM, unless you set it to 0. The Bonsi only delivers O2 when you inhale. My concern is rapidly draining the tank. Anyone have experience w/non-conserving regulator?
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