Flowmeter Liquid GPM Max 20 Max Pressure (PSI) 100 Connection Size (In.) 1 NPT Max Temp (F) 130 Length (In.) 5-1/4 Width (In.) 5-1/2 Height (In.) 5 Housing Material Polypropylene Fitting Brass Chamber Material Polypropylene Seal Material Buna N Flow Range 2 to 20 gpm Display Digital Resetable Cumulative Totalizer 999 Gallons Max Viscosity 50 SSU Max Viscosity (SSU) 50 For Pipe Size 1 In.