Flowmeter Liquid GPM Max 40 Max Pressure (PSI) 50 Connection Size (In.) 1-1/2 NPT Max Temp (F) 176 Length (In.) 10-1/2 Width (In.) 7-1/2 Height (In.) 6-1/2 Housing Material Aluminum Fitting Brass Chamber Material Polypropylene Seal Material Buna N Flow Range 6 to 40 gpm Display Digital Resetable Cumulative Totalizer 9999 Gallons Max Viscosity 50 SSU Max Viscosity (SSU) 50 For Pipe Size 1-1/2 In.