Toilet Tank, White, 1.28 Gallons per Flush, Left Hand Lever, ADA

Gerber GVP38590 Fluidmaster® 400A Fill Valve – Universal Toilet Replacement Valve

The Gerber GVP38590 is a Fluidmaster® 400A anti-siphon fill valve, designed to restore and maintain reliable toilet performance. As one of the most widely used replacement fill valves in the plumbing industry, the 400A model is known for its adjustable height, anti-siphon functionality, and compatibility with a broad range of two-piece toilet tanks.

Constructed from corrosion-resistant plastic and featuring an adjustable riser, the valve accommodates tank heights between 9 and 14 inches. It is suitable for use in systems with a 1.6 gallon-per-flush rating and meets anti-siphon requirements to protect the potable water supply. This model is ideal for both residential replacement jobs and new installations where a dependable fill mechanism is required.

Key Features

• Universal Fit: Compatible with most two-piece toilet configurations
• Adjustable Height: Adapts from 9" to 14" to match tank dimensions
• Anti-Siphon Design: Prevents backflow into the supply line
• Quiet Fill Performance: Engineered to reduce noise during tank refill
• Tool-Free Installation: Designed for fast setup with minimal tools required

Technical Specifications

• Model: Fluidmaster 400A
• Height Range: 9"–14"
• Material: Durable polymer
• Flush Volume Compatibility: 1.6 GPF systems
• Compliance: Anti-siphon certified
• Warranty: 5-year limited

Installation Guidance

This valve installs within minutes and does not require specialized tools, though an adjustable wrench is recommended. For best results, ensure the tank is drained, the old valve is removed cleanly, and the refill tube is secured to prevent siphoning. Always verify local plumbing code requirements for installation compliance.

Contractor Notes

• ✔ Ideal for residential service work and quick-turn installations
• ✔ Adjustable design simplifies stock management and on-site fitment
• ✔ Proven reliability makes it a go-to choice across various brands and models