POTTER VSR-3.5eBayProduct OverviewThe VSR 3. 5 is a highly dependable vane type waterflow switch designed for use on wet sprinkler systems. Engineered for accuracy and long term performance, it is certified by UL, cUL, CSFM, and FM, with the VSR EU version available for CE and VdS compliance. Suitable for steel pipe ranging from 2" to 8" (schedules 1040), this model detects water movement when a minimum flow of 10 GPM (38 LPM) occurs downstream. Its design includes
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