Product details:
20, Standard Tank Equivalent (Gal.) 42, Vertical Tank Style, 8.1 Gallons Drawdown @ 20-40 PSI, 5.4 Gallons Drawdown @ 30-50 PSI, 5.9 Gallons Drawdown @ 40-60 PSI, 4.7 Gallons Drawdown @ 50-70 PSI, 4.2 Gallons Drawdown @ 60-80 PSI, 3.8 Gallons Drawdown @ 70-90 PSI, 3.5 Gallons Drawdown @ 80-100 PSI, Precharge Pressure (PSI) 40, Acceptance Factor 0.40, Height (In.) 29, Dia. (In.) 16, Length (In.) -, Inlet/Outlet NPT (In.) 1 F, Air Volume Control NPT (In.) -