Hydrotek HB8CB-128-WB Automatic Battery-Operated Flush Valve (1.28 GPF Closet)

The Hydrotek HB8CB-128-WB is a high-efficiency (HEF) concealed flush valve system engineered for facilities that prioritize water conservation, architectural security, and long-term durability. This 1.28 GPF (4.8 LPF) closet valve is designed for behind-the-wall installation and features an integrated stainless steel wall box, providing an elite level of protection against vandalism. Configured for a 1-1/2" back spud connection and including a 1" inlet stop, this system reduces water consumption by 20% compared to standard 1.6 GPF models, making it an ideal choice for LEED-certified projects and high-traffic commercial environments.

Professional-Grade Engineering & Vandal Resistance

• Integrated Wall Box Security: The "WB" designation indicates the inclusion of a heavy-gauge, recessed stainless steel wall box. This enclosure houses the sensor and flush mechanism, shielding them from tampering, theft, and impact. It is the preferred configuration for high-security environments like correctional facilities, stadiums, and transportation hubs.
• Superior Piston Technology: Hydrotek’s industrial-grade piston mechanism offers a significant performance advantage over traditional diaphragm valves. It ensures a precise 1.28 GPF flush regardless of water pressure fluctuations and is highly resistant to sediment and mineral buildup, which are common causes of valve run-on or failure.
• Corrosion-Resistant Internals: Built with a high-quality brass valve body and industrial-grade VSI silicone elastomer seals, the system is designed to withstand the harsh effects of chlorine, chloramines, and other aggressive water treatments found in municipal supplies.
• Concealed Back Spud Interface: By utilizing a 1-1/2" back spud connection, all plumbing remains behind the wall. This creates a streamlined restroom aesthetic while eliminating exposed pipes that could be targeted for vandalism or accidental damage.

Advanced Sensor & Logic Features

• Touchless ADA Compliance: The integrated infrared sensor provides a 100% hands-free experience, fulfilling all ADA accessibility requirements while improving overall restroom hygiene by eliminating common touchpoints.
• Battery-Powered Versatility: Powered by four (4) standard AA alkaline batteries, this valve is an excellent solution for both new construction and retrofitting facilities where hardwiring is not feasible or cost-effective.
• Mechanical Manual Override: Features a true manual-mechanical override button, ensuring the toilet remains fully operational and can be flushed manually even in the event of battery exhaustion.
• Automated Hygiene (Sentinel) Flush: Includes a built-in 24-hour sentinel flush feature that automatically activates the valve during periods of low usage. This keeps the fixture’s trap seal primed to prevent the entry of sewer gases into the facility.
• Smart Self-Diagnostics: The electronic system 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: High-efficiency 1.28 GPF (4.8 LPF).
• Operating Pressure: Reliable performance across a pressure range of 10–125 PSI.

Shop at ProDryers: Modernize your facility with a high-efficiency flush valve that combines superior water savings with maximum security. Buy the Hydrotek HB8CB-128-WB at ProDryers to secure the best market pricing, or request a best price quote for your high-efficiency commercial renovation or LEED-certified project today.