... 1)Thread:1/2" to 2" 2)Material:ABS, PE,NR 53)Usage:Cooling tower, heat exchange ... to use the pressure difference self-locking principle, control for more small, water flow more big, ... water tank, water tower of water level automatic control, product universal adjustment function, suitable for all kinds ... effect is good, compression. With smaller floating ball control, but it can accept more of the liquid ...