Hydrologic 1/4" Flowmaster Ultra Low Flow Model
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Flowmaster - 1/4" QC - gallonage & filter capacity monitor. Operates at flow rates between 0.01-0.5 GPM. Ultra low-flow model. Alerts you when it's time to change your filters. For StealthRO and Triton RO or most RO systems with 1/4" fittings.