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All Categories > Residential Water Heaters > Ultra-Low NOx Natural Gas Residential Water Heaters > American Standard® Ultra-Low NOx Natural Gas Residential Water Heaters > Ultra-Low NOx Residential Gas Water Heaters > Item # G-50T-2-3-12  

Item # G-50T-2-3-12, Ultra-Low NOx Residential Gas Water Heaters

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Unit of Measure: Imperial Metric Both

Specifications  · Maximum Recovery  · Dimensions  · Features  · General Information  · Warranty  · Note



American Standard®


50 gal

First Hour Rating

80 gal

Input Power

40000 BTU/hr

Energy Factor


R Factor


Approximate Shipping Weight

173 lb

Model Type

Highest Efficiency

Test Pressure

300 psi

Working Pressure

150 psi




Natural Gas

Industry Standards

C.E.C. Listed
CSA® Certified


Maximum Recovery

Recovery at 90 ºF Temperature Rise

43 gal/h



Vent Diameter A

3 in

Jacket Diameter B

22-1/4 in

Height to Top of Heater C

57-1/8 in

Height to Top Water D

58-3/8 in

Height to Side T and P E

51 in

Height to Top of Vent F

60-1/8 in

Water Spread G

8 in

  • Ultra-low NOx Burner - Complies with Southern California SCAQMD 2008 Rule 1121 and Northern California BAAQMD 2009 10ng/J NOx emissions requirements.
  • Vaporshield Technology - Shuts off gas and air supply to heater to prevent prolonged vapor burn in combustion chamber should accidental or unattended ignition of flammable vapors occur outside the water heater.
  • Piezo Igniter - Affords push button pilot lighting in lieu of matches.
  • Maintenance Free - No periodic cleaning of combustion air inlet necessary under normal conditions.
  • Standard Thermocouple - Design provides for use of either factory supplied thermocouple or standard replacement thermocouple.
  • Self-cleaning - Turbulence inducing cold water inlet-tube engineered to diminish hard water area sediment deposits.
  • Non-CFC Foam Insulated - Saves energy and reduces fuel costs by maximizing heat retention.
  • High Efficiency Models - meet energy-efficiency 0.62 EF (Energy Factor) requirements of many gas utility rebate programs and comply with CEC Title 24.
  • Heavy Gauge Steel Tank - For extra years of trouble-free service.
  • Glass-lined Tank - Inner tank glass-lined with Dura-Glas™ and fired at 1600 ºF for optimum protection from the effects of corrosion.
  • Magnesium Anode Rod - To protect tank life.
  • Factory Installed Dielectric Hot and Cold Water Connections - 3/4" NPT water connections to extend tank life and for easier installations.
  • Brass Drain Valve - Durable to prevent unintentional breakage.
  • Factory Installed Heat Traps - Reduces standby heat loss in water piping.
  • Temperature and Pressure Relief Valve - Factory provided T & P Valve can be relocated from side to optional top opening.
  • Factory Installed Energy Cut-off System - Automatic thermostat with built-in gas pressure regulation also incorporates energy cutoff switch to prevent abnormally high water temperature for added safety.
  • Design Certified by CSA International - To meet or exceed ANSI requirements and tested in accordance with D.O.E. test procedures and meets or exceeds the energy efficiency requirements of NAECA, ASHRAE and all state energy efficiency standards.

General Information
  • All models meet SCAQMD 2008 Rule 1121 and Northern California BAAQMD 2009 10ng/J NOx emissions requirements.
  • All models comply with NAECA requirements and are CEC listed.
  • Recovery capacity based on actual performance tests.
  • All models are certified at 300 psi test pressure and 150 psi working pressure.
  • Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.

  • Choice of 12-Year Limited Tank Warranty
  • Includes 12-Year Limited Warranty on Component Parts.

Available in 40 & 50 Gallon Models.


·  Design Certified


Brochure for Ultra-Low NOx Residential Gas Water Heaters
(PDF, 869KB)