FlowVis Flow Meter from H2flow Controls was developed for pools, spas, fountains and waterfeatures. The 3-inch and 4-inch models add to the series, which includes smaller models. FlowVis combines a flow meter and a check valve to maximize energy-saving potential. The flow meters can be installed in any orientation and in any proximity to other units without affecting the measurement accuracy. Contact: 888.635.0296; h2flow.net

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