AO Smith 40G Short Water Heater

A.O. Smith GCRL-40 ProMax Short 40 Gallon Gas Water Heater

Internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response
Uses a thermopile to generate the power needed to operate the electronic gas control without requiring an external power source
Electronic gas control incorporates an LED status indicator that monitors system operation and service diagnostics
Dynaclean diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output; made from long-lasting PEX cross-linked polymer Push-button Piezo igniter makes lighting pilot fast and easy with one-hand push-button spark ignition


The ProMax family offers a wide range of water heating solutions-from models that help you qualify for gas utility rebates to high recovery models ideal for large families with high demand for hot water. And, our specialty vent gas water heater options can be installed almost anywhere in your home because they can vent up to 40 feet. Our direct vent models feature two-pipe combustion systems that draw clean air from outside the home, eliminating any worries about indoor ventilation.