Hydrotek HB8SLE-R128DFD Automatic Solar-Powered Dual-Flush Retrofit Kit (1.28 / 1.0 GPF Closet)

The Hydrotek HB8SLE-R128DFD is an industry-leading, sensor-activated dual-flush retrofit kit specifically engineered to modernize manual Delany closet flush valves. This sustainable solution introduces advanced solar energy harvesting and high-efficiency dual-flush logic to existing plumbing infrastructure. By providing a full 1.28 GPF (4.8 LPF) flush for solid waste and a reduced 1.0 GPF (3.8 LPF) flush for liquid waste, this kit enables facility managers to achieve maximum water conservation and superior hygiene without the infrastructure costs of a total valve replacement.

Sustainable Solar Energy Harvesting & Efficiency

• Ambient Light Power System: The HB8SLE-R128DFD features integrated solar cells designed to harvest energy from both natural and artificial indoor light. This energy is stored in a long-life internal capacitor, providing a reliable power source that operates independently of the building’s electrical grid.
• Redundant Battery Backup: To ensure 100% operational uptime in low-light environments or during periods of extended darkness, the system includes a redundant battery backup. This dual-power architecture ensures consistent performance regardless of lighting conditions.
• Minimal Maintenance Lifecycle: By utilizing solar energy as its primary power source, the system significantly extends the life of the backup batteries, reducing maintenance labor costs and the environmental impact of disposable battery waste.

Professional-Grade Engineering & Delany Integration

• Specialized Delany Compatibility: The "DFD" designation confirms that this retrofit kit is precision-contoured for a perfect mechanical fit with Delany brand manual closet flush valves. This allows for a rapid, "top-down" upgrade that preserves the heavy-duty brass valve body while adding modern electronic intelligence.
• Intelligent Dual-Flush Logic: The integrated infrared sensor features sophisticated "User-In-View" timing. The system automatically selects the appropriate flush volume based on the duration the user is present, maximizing water savings 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, outperforming traditional diaphragm kits in both longevity and maintenance intervals.

Advanced Sensor & Hygiene 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.
• True Mechanical Manual Override: For maximum reliability, the HB8SLE-R128DFD includes a standard manual-mechanical override button. This ensures the toilet remains fully functional for users even in the absence of light or power, 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: Solar-Powered 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: Solar-Powered with Battery Backup (Ambient Light Harvesting).
• Operating Pressure: Reliable performance across a pressure range of 10–125 PSI.

Shop at ProDryers: Modernize your Delany fixtures with the ultimate combination of sustainable power and high-efficiency dual-flush performance. Buy the Hydrotek HB8SLE-R128DFD at ProDryers to secure the best market pricing, or request a best price quote for your eco-friendly commercial renovation or facility upgrade today.

Download the Spec Sheet