Fluidmaster 400A Universal Toilet Fill Valve Anti-Siphon Easy Install Fix Kit Fluidmaster 400A Universal Toilet Fill Valve offers a reliable solution for fixing noisy toilets and replacing outdated ballcocks. This anti-siphon design complies with plumbing codes and features an EZ-Twist height adjustment that ranges from 9 inches to 14 inches to fit most tanks. The integrated water level adjusting screw allows for precise flush control, while the Torque Guard locknut helps prevent thread damage from over-tightening. Designed for easy installation, this trusted component includes the fill valve, shank washer, locknut, refill tube, and refill clip to restore your bathroom's efficiency.