Hubbell J640 | 6 Gal | 40.5kW Compact Booster Heater | J640T4 480V/Three Phase

The Hubbell J640 6-gallon booster water heater provides high-temperature rinse water that sanitizes dishes and flatware in commercial warewashers. Designed with service in mind, every major component can be accessed and replaced without taking the entire unit apart. Straight-thread screw-in elements with O-ring seals make swaps quick, while the all-in-one probe handles all sensing functions and can be changed without draining the tank. Standardized electronic parts across all Hubbell models—the T1000 Control Board, TD1000 Digital Display, and P65 Probe Sensor—mean fewer unique spares to stock. 

Key Features:

• Stainless-steel tank with no internal lining for corrosion resistance, backed by a full 10-year, non–pro-rated warranty.
• Compact standard dimensions meet the footprint of other leading brands.
• Digital display controller with clear temperature set point, error messages, low-water alert, and leak detection.
• High efficiency (CFC/HCFC-free) foam insulation.
• Safety components: resettable circuit breakers when required (no fuses), temperature & pressure relief valve, T&P gauge, pressure reducing valve with bypass.
• Plastic adjustable legs.
• Low lead certification.