Toilet Fill Valve Adjustable Anti-siphon For Standard Toilets, Fluidmaster 400A Upgrade your toilet?s performance with the Fluidmaster 400A Universal Toilet Fill Valve, the world?s #1 best-selling fill valve trusted by plumbers and manufacturers worldwide. Designed for reliable, leak-free operation, this universal-fit valve replaces most standard toilet fill valves and is ideal for toilets with tank depths between 9 and 14 inches. Its adjustable height design allows for a precise fit in a wide range of toilet tanks, ensuring optimal water level control and efficient refilling after each flush. Engineered with an anti-siphon feature, the 400A prevents backflow contamination, meeting strict plumbing safety standards including ASSE, CSA US, and UPC codes. The valve is constructed with durable plastic and metal components for long-term resistance to corrosion and wear. It includes all necessary hardware for quick and easy installation?no special tools required?making it perfect for DIY repairs or professional service. The 400A is recommended for use in toilets with 3.5+ gallons per flush (GPF) systems, delivering consistent performance in older and high-capacity models. For complete toilet optimization, consider replacing the flapper at the same time?Fluidmaster offers compatible flappers to ensure full system reliability. Weighing 0.54 lbs (0.500 lb per unit), this compact valve measures 12.6 inches in height and 3 inches in width and depth. It fits universal toilet configurations and is widely used in residential bathrooms, commercial restrooms, and maintenance applications. Its black standard color blends discreetly inside the tank. Features - Universal fit for toilet tanks 9 to 14 inches deep - Adjustable height for precise installation - Anti-siphon design prevents backflow and meets plumbing codes - Includes all installation hardware for fast, tool-free setup - Durable plastic and metal construction resists corrosion - Proven performance in 3.5+ GPF toilets - Trusted by plumbers and toilet manufacturers worldwide - Easy to install and service - Meets ASSE, CSA US, and UPC certifications - Ideal for both repair and new installations Specifications - Brand Name: Fluidmaster - Model Name: Fluidmaster 400A - Part Number: 400A - UPC: 039961000026 - Alternative UPC: 039961240118 - Product Type: Toilet Fill Valve - Plumbing Part Type: Fill Valve - Toilets Urinals Product Type: Fill Valve - Universal Fit: Yes - Fits: Universal - Valve Type: Fill - Adjustability: Adjustable (9 to 14 inch) - Connection Size: 9 to 14 inches - Anti-Siphon: Yes - Material: Plastic - Body Material: Metal/Plastic - Primary Material: Plastic - Standard Color Family: Black - Color: Black - Hardware Included: Yes - Handles Included: No - Number in Package: 1 pk - Pack Size: 1 - Product Dimensions: 3 in W x 3 in D x 12.6 in H - Product Depth (in.): 3 - Product Height (in.): 12.6 - Product Length (in.): 3 - Item Weight: 0.54 lb - Each Weight: 0.500 lb - Manufacturer: Fluidmaster, Inc. - Country of Origin: Mexico Product Application The Fluidmaster 400A Universal Toilet Fill Valve is designed for use in residential and commercial toilets requiring reliable, code-compliant refill performance. It is ideal for replacing worn or leaking fill valves in older tanks, particularly those with 3.5 gallons per flush or higher. Commonly used in homes, offices, schools, and public restrooms, this valve ensures consistent water level control, reduces noise, and prevents overflow. Its universal fit and adjustable design make it a go-to solution for plumbers and homeowners performing repairs or maintenance. When paired with a new Fluidmaster flapper, it restores full toilet functionality for years of dependable service.