PPD02 Zenner Nitro MultiJet 5/8 in x 3/4 in Residential Water Submeter Cold water submeter with optional pulse output. Multi-jet Water Meters utilize a magnetically driven multi-jet design. They are designed to measure cold potable water where flow is in one direction. Sizes 5/8" through 2" Applications:ResidentialCommercialIndustrialFeatures:Engineered and manufactured to provide long-term service and operate virtually maintenance freePrecise simple design allows for interchangeable parts, reducing parts inventoryEase of installationSealed design eliminates dirt, moisture infiltration, and prevents foggingComplies with AWWA C708 & ISO 4064 performance standardsNote: it is important to note that both connections are 3/4 in and the 5/8 in is referring to the size of the measuring chamber.