Trust in the quality of the Fluidmaster 400A Toilet Tank Repair Fill Valve to meet your needs. Quick and easy to install it s height-adjustable to fit in nearly any 1- or 2-piece model for your convenience. This Fluidmaster toilet tank fill valve helps to stop water running and tank noise and reduces wasted water. Swap it with the float ball and rod mechanism in your older unit. This toilet tank fill valve replacement is made of long-lasting corrosion-resistant materials. An anti-siphon design guards against contamination. New 400AP4 Toilet Fill Valve 0.55lb. with a 5 year warranty.