Hydrotek HB8-R16DFD Automatic Dual-Flush Retrofit Kit (1.6 / 1.0 GPF Closet)

The Hydrotek HB8-R16DFD is an advanced, sensor-activated dual-flush retrofit kit specifically engineered to transform manual Delany closet flush valves into high-efficiency, touchless systems. This industrial-grade solution introduces dual-flush logic to existing plumbing, providing a full 1.6 GPF (6.0 LPF) flush for solids and a reduced 1.0 GPF (3.8 LPF) flush for liquids. By upgrading to this battery-operated system, facility managers can significantly reduce water consumption and improve restroom hygiene without the infrastructure costs of a total valve replacement.

Professional-Grade Engineering & Seamless Integration

• Specialized Delany Compatibility: The "DFD" designation signifies that this kit is precision-contoured for a perfect mechanical fit with Delany brand manual closet valves. This allows for a rapid upgrade that preserves the existing heavy-duty brass valve body while adding modern electronic intelligence.
• Intelligent Dual-Flush Logic: The integrated infrared sensor features advanced "User-In-View" timing. The system automatically selects the appropriate flush volume based on the duration the user is present, ensuring maximum water savings without compromising fixture performance or cleanliness.
• Touchless ADA Compliance: By replacing the manual handle with an automated sensor, this kit provides a 100% hands-free experience. This fulfills ADA accessibility requirements and eliminates a primary surface for cross-contamination, essential for modern public health standards.
• Precision Piston Reliability: Hydrotek’s proprietary industrial-grade piston technology ensures a consistent flush volume regardless of water pressure fluctuations. The piston mechanism is highly resistant to mineral buildup and debris, outperforming traditional diaphragm kits in longevity and maintenance intervals.
• Corrosion-Resistant Construction: Built with a high-quality brass sensor housing and a durable chrome finish, the HB8-R16DFD is designed to withstand high-traffic use and the aggressive effects of treated municipal water.

Advanced Sensor & Logic Features

• Significant Water Conservation: By utilizing the 1.0 GPF reduced flush for the majority of cycles, facilities can realize substantial utility savings and contribute to green building certifications like LEED.
• Battery-Powered Independence: Powered by four (4) standard AA alkaline batteries, this kit requires no hardwiring, making it the ideal choice for retrofitting older facilities where electrical access is limited.
• True Mechanical Manual Override: For maximum reliability, the HB8-R16DFD features a standard manual-mechanical override button. This ensures the toilet remains fully operational for users even if the batteries are exhausted.
• Automated Hygiene (Sentinel) Flush: Includes a built-in 24-hour sentinel flush feature. If the fixture remains unused for a 24-hour period, the system automatically triggers a flush to maintain the trap seal and prevent sewer gases from entering the restroom.
• Smart Self-Diagnostics: The electronics include integrated self-diagnostic capabilities and a manual reset function to streamline troubleshooting and routine maintenance for facility staff.

Technical Specifications & Performance

• Application: Dual-Flush Retrofit Kit for manual Delany Closet Valves.
• Fixture Type: Closet (Toilet).
• Flush Volume: Dual-Flush 1.6 GPF / 1.0 GPF (6.0 LPF / 3.8 LPF).
• Power Source: 4 x AA Alkaline Batteries.
• Operating Pressure: Reliable performance across a pressure range of 10–125 PSI.

Shop at ProDryers: Modernize your Delany fixtures with the ultimate combination of water efficiency and sensor reliability. Buy the Hydrotek HB8-R16DFD at ProDryers to secure the best market pricing, or request a best price quote for your high-efficiency commercial renovation or facility upgrade today.

Download the Spec Sheet