Fluidmaster, PRO45B, Toilet Fill Valve

Fluidmaster® PRO45B Fill Valve – Premium Brass Shank Fill Valve for Professional Installations

The Fluidmaster® PRO45B delivers quiet performance and long-lasting durability, making it an ideal choice for contractors seeking a reliable fill valve with robust construction. Equipped with a heavy-duty brass shank, this model is built to outperform standard plastic options in high-demand environments.

Engineered for Commercial-Grade Reliability

Designed to meet the expectations of plumbing professionals, the PRO45B features quiet refill operation, a corrosion-resistant brass shank, and precision water level adjustment. This anti-siphon valve is fully compliant with code requirements and is compatible with all brands of gravity-fed toilets, making it a go-to solution for both repair and new installations.

Key Features

• Solid Brass Shank – Resists cracks, cross-threading, and corrosion for added strength at the tank connection.
• Ultra-Quiet Operation – Delivers a near-silent refill cycle, reducing noise in residential and commercial applications.
• Adjustable Height – Customizable for tank heights from 9” to 14” to ensure optimal refill rate and water level.
• Integrated Water Hammer Control – Helps reduce system shock and noise from rapid valve closure.
• Anti-Siphon Backflow Protection – ASSE 1002 certified for backflow prevention, ensuring compliance with plumbing codes.
• Compatible with All Major Toilet Brands – Ideal for service calls or standardized inventory needs.

Technical Specifications

• Model: PRO45B
• Connection Type: 7/8" brass ballcock shank
• Adjustment Range: 9"–14" tank height
• Operating Pressure: 20–80 PSI
• Body Material: High-strength polymer with brass shank
• Certifications: UPC, ASSE 1002, CSA B125.3
• Warranty: 5-Year Limited

Installation Guidance

The PRO45B is designed for fast and reliable installation. For best results, contractors should ensure the critical level (CL) mark is positioned at least 1” above the tank's overflow tube. Tighten connections per manufacturer torque specs to avoid overtightening or leaks. A professional-grade adjustable wrench is recommended for securing the brass shank to the tank.

Built for the Demands of the Trade

Trusted by professionals across the industry, the Fluidmaster PRO45B is an essential part of any contractor's inventory. Its dependable performance, quiet fill operation, and rugged brass components make it a reliable solution for service technicians, maintenance teams, and plumbing installers alike.