Standard Bob float valve assemblies consist of valve, brass stem, and copper 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. 1/2" NPT male inlet x 1/2" NPT male outlet. High capacity, heavy duty. Red Brass Body. Adjusting arm tapped 1/4"-20 thread. Buna-N-Disc standard. 1/4"-20 x 10" stem.