Assured Automation WM-PC Multi-jet Water Meters The WM-PC Series of multi-jet water meters are a simple and cost effective solution for sub-metering water. The are ready to add a reed switch to provide a pulse output for use by a digital display or wireless transmitter. Constructed engineering plastic they are safe for use with drinking water. Available in Gallons, Cubic Feet, and Liters. Sizes from 1/2" to 1 1/2" All meters come with a set NPT union fittings and gaskets.