Hydrotek HB8CB-128DF-WB Automatic Dual-Flush Flush Valve (1.28 / 1.0 GPF Closet)

The Hydrotek HB8CB-128DF-WB represents the pinnacle of high-efficiency, high-security restroom technology. Engineered for the most demanding commercial environments, this dual-flush closet valve provides a standard 1.28 GPF (4.8 LPF) flush for solids and a reduced 1.0 GPF (3.8 LPF) flush for liquid waste, easily meeting WaterSense and LEED Platinum water conservation requirements. Designed for behind-the-wall installation and featuring an integrated heavy-duty stainless steel wall box, this system is the definitive choice for facilities where architectural security and water sustainability are equally critical.

Professional-Grade Engineering & Vandal Resistance

• Integrated Wall Box Security: The "WB" designation signifies a recessed, heavy-gauge stainless steel wall box enclosure. By housing the infrared sensor, flushing logic, and all mechanical components within the wall, the system is completely shielded from physical impact, tampering, and theft. This is the essential configuration for high-security environments like correctional facilities, transportation hubs, and public stadiums.
• Industrial-Grade Piston Technology: Unlike traditional diaphragm valves that are prone to stretching and failure, Hydrotek’s proprietary piston design ensures precise and consistent flush volumes. The piston remains highly accurate regardless of water pressure fluctuations and is exceptionally resistant to mineral deposits and debris—the primary causes of valve failure and costly leaks.
• Corrosion-Resistant Construction: Manufactured with a high-quality brass valve body and industrial-grade VSI silicone elastomer seals, the system is engineered to withstand the aggressive effects of chlorine and chloramines commonly found in municipal water supplies.
• Concealed 1-1/2" Back Spud Interface: Configured for a 1-1/2" back spud connection and including a 1" inlet stop, this system keeps all plumbing connections behind the wall. This eliminates exposed piping that could be used as a leverage point for vandalism and creates a modern, streamlined user environment.

Intelligent Dual-Flush Sensor Logic

• Automated Conservation Logic: The sophisticated infrared sensor automatically determines the required flush volume based on the duration of the user's presence. This "smart" operation ensures consistent water savings by removing the need for user decision-making or manual button selection.
• Touchless ADA Compliance: Provides a 100% hands-free experience, fulfilling all ADA accessibility requirements while significantly improving facility hygiene by eliminating common touchpoints and reducing cross-contamination.
• Battery-Powered Independence: Powered by four (4) standard AA alkaline batteries, the HB8CB-128DF-WB is an ideal solution for retrofitting facilities where hardwiring is difficult or for new construction seeking simplified installation.
• True Mechanical Manual Override: Features a standard manual-mechanical override button that remains fully functional even in the event of battery exhaustion, ensuring the toilet is always operational and flushing is available for users.
• Smart Self-Diagnostics: Includes integrated self-diagnostic capabilities and a manual reset function to simplify troubleshooting and streamline routine maintenance for facility staff.

Technical Specifications & Performance

• Application: Concealed (behind-the-wall) with recessed wall box.
• Fixture Type: 1-1/2" Back Spud Closet (Toilet).
• Inlet Size: 1" NPT.
• Flush Volume: Dual Flush 1.28 GPF (4.8 LPF) / 1.0 GPF (3.8 LPF).
• Operating Pressure: Reliable performance across a pressure range of 10–125 PSI.

Shop at ProDryers: Achieve the highest LEED ratings and maximize facility security with the ultimate in high-efficiency dual-flush technology. Buy the Hydrotek HB8CB-128DF-WB at ProDryers to secure the best market pricing, or request a best price quote for your high-efficiency commercial renovation or new construction project today.