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4" WOLTMANN HELIX STYLE WATER METER FOR TOTALIZATION AND RATE INDICATION WITH PULSE OUTPUT Features: Pulse Output Components; Hydrocarbon Resistant Seals; Sealed Dry Dial for Clear Readings. Specifications: Woltmann helix style water meter; Cast iron meter body, epoxy coated; Accuracy class B; 6 digit mechanical roller counter; Reads in Gallons; Nominal Flow 440 gpm; Max. Flow 550 gpm; Pulse: 100 gal/pulse; Accuracy: Transitional Flow: ±5% Nominal Flow: ±2%; Maximum Water Temperature: 86°F; Maximum Water Pressure: 150 psi; Mounting Orientation: Horizontal; Materials: Body: Cast Iron ; Measuring Chamber: Polyethylene; Paint: Epoxy Coated; Seal: Viton; Not for use with Potable Water