Fluidmaster 400A Toilet Fill Valve

Upgrade your toilet’s performance with the Fluidmaster 400A Toilet Fill Valve. Engineered for reliability and easy installation, this universal fill valve delivers consistent water flow, quiet operation, and leak-free performance in virtually all 1-piece and 2-piece toilets. Its simple height adjustment and one-piece design make maintenance a breeze, saving you time and helping prevent costly water waste.

From DIY repairs to professional plumbing jobs, the 400A ensures a perfect refill every time. Its robust construction resists clogging and corrosion, while the anti-siphon design protects your water supply. Whether you’re replacing an old fill valve or installing a new toilet, the Fluidmaster 400A brings trusted quality straight to your bathroom.

Key Features

• Universal compatibility with most 1-piece and 2-piece toilets
• Adjustable height (10"–14") for a precise fit
• One-piece, non-stick assembly for quick, tool-free installation
• Anti-siphon safety float prevents backflow contamination
• Durable polymer construction resists corrosion and clogging
• Quiet, constant-pressure fill action for reduced noise

⚠️ WARNING: This product can expose you to Formaldehyde (gas) known to the State of California to cause cancer. For more information, visit www.P65Warnings.ca.gov.