How Do You Adjust a Fluidmaster Fill Valve?

If the Fluidmaster fill valve has a stainless steel rod and clip, adjust the water level by pinching the clip and sliding it up or down the rod to raise or lower the water level. For the newer style valve with the plastic adjustment rod, turn the screw at the top of the rod to adjust the water level. Flush the toilet to lower the level and turn the screw, using a screwdriver or your fingers to adjust the float.