Hydrotek HB8CRFKC-1.28GPF Automatic Closet Retrofit Kit (1.28 GPF)

The Hydrotek HB8CRFKC-1.28GPF is a heavy-duty, battery-powered concealed retrofit kit designed to convert manual flushometers into high-efficiency, touchless systems. Specifically engineered for behind-the-wall installations, this kit is compatible with industry-standard Sloan Royal/Sloan and Zurn Z9000 series valve bodies. By delivering a precise 1.28 GPF (4.8 LPF), this unit meets High-Efficiency Toilet (HET) standards, providing a 20% water savings over traditional 1.6 GPF valves and helping facilities achieve LEED certification and sustainability goals.

Professional-Grade Engineering & Retrofit Compatibility

• Vandal-Resistant Concealed Design: Built specifically for concealed applications, this kit keeps all mechanical and electronic components behind the wall, ensuring a sleek restroom aesthetic while protecting the hardware from tampering.
• Universal Valve Integration: Precision-engineered to fit existing Sloan and Zurn concealed closet valve bodies, allowing for a rapid, non-invasive upgrade to sensor technology without the cost of a full valve replacement.
• Industrial Piston Accuracy: Hydrotek’s superior piston technology ensures consistent flush volumes regardless of water pressure fluctuations, offering higher reliability and longer service life than traditional diaphragm kits.
• Chemical-Resistant Seals: Equipped with industrial-grade VSI silicone elastomer seals that resist degradation from chlorine, chloramines, and other aggressive water treatment chemicals, ensuring leak-free performance.

Advanced Sensor Intelligence

• Touchless ADA Compliance: The advanced infrared sensor provides a completely sanitary, "no-hands" experience, fulfilling ADA accessibility requirements while significantly reducing the spread of germs in high-traffic environments.
• Battery-Powered Reliability: Powered by four (4) standard AA alkaline batteries, this kit is the ideal solution for retrofitting facilities where hardwiring is not feasible or would be cost-prohibitive.
• Smart Self-Diagnostics: Features an integrated electronic system with self-diagnostics and a manual reset function to simplify troubleshooting and streamline facility-wide maintenance.
• Automated Hygiene Flush: Includes a built-in 24-hour sentinel flush feature that automatically activates the valve during periods of inactivity to maintain the trap seal and prevent sewer gas odors.
• True Mechanical Override: Equipped with a standard manual-mechanical override button, ensuring the toilet remains fully functional even in the event of battery exhaustion.

Technical Specifications & Installation

• Application: Concealed (behind-the-wall) water closet retrofit.
• Flush Volume: High-efficiency 1.28 GPF (4.8 LPF).
• Operating Range: Engineered for reliable performance across a wide pressure range of 10–125 PSI.
• Simplified Installation: Designed for easy integration into existing valve bodies, minimizing labor costs and restroom downtime during facility upgrades.

Shop at ProDryers: Upgrade your facility's concealed plumbing with a high-efficiency solution built for the rigors of modern commercial use. Buy the Hydrotek HB8CRFKC-1.28GPF at ProDryers to secure the best market pricing, or request a best price quote for your next high-traffic commercial retrofit or renovation project today.

Download the Spec Sheet