POTTER VSR-2eBayProduct OverviewThe VSR 2 is a vane type waterflow switch engineered for wet sprinkler systems, offering reliable flow detection across a wide range of steel pipe installations. UL Listed, FM Approved, and compliant with multiple international certifications, it supports pipe schedules 10 through 40 in 2" to 8" diameters, with LPC approval for the same range. This model can also function as a sectional flow detector in larger system layouts.