Reduce water flow to 0.8 GPM with a just a turn of the dial on this Danco 1.5 GPM aerator. It has dual threads, 15/16″-27M or 55/64″-27F, and an adjust & flow dial that regulates water usage. It features cyclone technology which reduces water consumption without sacrificing water pressure. It is watersense certified and can save you up to 30% water as compared to using the standard 2.2 GPM aerator. The removable/replaceable insert features a twisting spray pattern.