Rexarc's Econ-O-Flow for liquid cylinders has a built-in automatic recovery system that virtually eliminates gas waste due to venting. Features automatic switchover from "IN USE" to "RESERVE" bank. If you are using three high pressure cylinders a week of the same gas, you are paying for the Rexarc Econ-O-Flow Manifold...year after year without any of the benefits.
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