Hydrotek HB8-R128DFD Automatic Dual-Flush Retrofit Kit (1.28 / 1.0 GPF Closet)

The Hydrotek HB8-R128DFD is a premium, sensor-activated dual-flush retrofit kit engineered specifically for the modernization of manual Delany closet flush valves. This high-efficiency solution introduces advanced dual-flush intelligence to existing plumbing, providing a high-performance 1.28 GPF (4.8 LPF) flush for solid waste and an ultra-conserving 1.0 GPF (3.8 LPF) flush for liquid waste. By upgrading to this battery-operated system, facilities can achieve significant water savings and improved hygiene standards while maintaining their existing heavy-duty valve bodies.

Professional-Grade Engineering & Seamless Integration

• Specialized Delany Compatibility: The "DFD" designation indicates that this kit is precision-contoured for a perfect mechanical fit with Delany brand manual closet valves. This allows for a rapid, "top-down" upgrade that preserves the durability of the original brass valve while adding modern electronic logic.
• High-Efficiency Dual-Flush Logic: The integrated infrared sensor features sophisticated "User-In-View" timing. The system intelligently determines the appropriate flush volume based on the duration of use, maximizing water conservation without compromising waste removal or fixture 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, a critical factor for modern public health standards.
• Industrial 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, significantly outperforming traditional diaphragm kits in both longevity and maintenance intervals.
• Corrosion-Resistant Construction: Built with a high-quality brass sensor housing and a durable chrome finish, the HB8-R128DFD is designed to withstand the rigors of high-traffic commercial use and exposure to treated municipal water.

Advanced Sensor & Battery Features

• Significant Water Conservation: By utilizing the 1.28 GPF full flush and 1.0 GPF reduced flush, this kit is an ideal solution for facilities pursuing LEED certification or adhering to strict regional water conservation mandates.
• Battery-Powered Independence: Powered by four (4) standard AA alkaline batteries, this kit requires no hardwiring. This makes it the preferred choice for retrofitting older buildings where electrical access in the restroom is limited or cost-prohibitive.
• True Mechanical Manual Override: For maximum reliability, the HB8-R128DFD includes a standard manual-mechanical override button. This ensures the toilet remains fully operational for users even if the batteries are exhausted, preventing fixture downtime.
• Automated Hygiene (Sentinel) Flush: Includes a built-in 24-hour sentinel flush feature. If the fixture is not used for a 24-hour period, the system automatically triggers a flush to maintain the trap seal and prevent sewer gases from entering the facility.
• Smart Self-Diagnostics: The electronics include integrated self-diagnostic capabilities and a manual reset function to streamline troubleshooting and ensure consistent performance for facility maintenance teams.

Technical Specifications & Performance

• Application: Dual-Flush Retrofit Kit for manual Delany Closet Valves.
• Fixture Type: Closet (Toilet).
• Flush Volume: Dual-Flush 1.28 GPF / 1.0 GPF (4.8 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 high-efficiency performance and sensor reliability. Buy the Hydrotek HB8-R128DFD 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