- This 1 in heavy duty mechanical float valve is used in commercial, industrial and agricultural applications for controlling high capacity water flow and can be tank wall-mounted. It has a bronze body construction with female NPT pipe threaded inlet connection and male straight-pipe threaded for locknut on the outlet side. It has serrated arms for easy adjustment of water level, bronze long and short arms, replaceable seals and no-jam single lever action. It is ideal for use in air conditioning, refrigeration and irrigation systems. The maximum pressure is 165 psi (11.4 bar).