Fluidmaster Fill Valve 400A . This valve is factory tested, and Mansfield made sure this fill valve would work properly before naming the Fluidmaster 400A as the replacement. It is fully adjustable in height from 9" to 14" so it can be used in many applications including the replacement of the Mansfield 2206 fill valve. The 400A offers quick refill rates, and replaces ballcocks, and other toilet fill valves. For best performance of your toilet, consider replacing the flapper, or seal along with the fill valve.