Standard Bob float valve assemblies consist of valve, brass stem, and float ball for positive water level control. Applicable for precision liquid level control, aggressive water applications, increased resistance to corrosion and chemicals, de-ionized, ultra pure, and reverse osmosis water, boiler feed water systems, kitchen steam tables, cooling towers, evaporative coolers, livestock waterier, car wash, high pressure wash, swimming pools, industrial tanks, food service and sanitary applications, many other agricultural and industrial uses. SST Valve. NSF Listed. 3/4" NPT male straight pipe thread inlet x 3/4" NPT male outlet. Tank wall mounted. High capacity, heavy duty. Adjusting arm tapped 1/4"-20 thread. Buna-N-Disc standard. Valve comes with viton seals. Free discharge flow capacity: 21 gpm at 35 psi, 32.5 gpm at 65 psi and 39.9 gpm at 85 psi.