ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater

Model GCG-50 400
3.7 out of 5 Customer Rating
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Capacity (Gallons)
Limited Tank Warranty
Height Classification
Advanced Options
Fuel Source
First Hour Rating
Maximum BTU's
Side Loop
Diameter

  • Delivers 81-gallon first hour rating
  • 40,000 BTU input atmospheric vent design delivers up to 0.62 Uniform Energy Factor
  • Standard atmospheric vent installation with 3" or 4" B-vent, no power required

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    What to Expect from this Model
    modal-clock
    tooltip
    Number of minutes you can enjoy a shower before running out of hot water. Assumes a 2.1 GPM flow rate
    30.4 minutes
    single shower length
    modal-frame
    tooltip
    Number of back-to-back showers you can take without running out of hot water. Assumes a 2.1 GPM flow rate and an 8 minute shower length
    3.8 showers
    back-to-back
    modal-frame
    tooltip
    Number of showers you can take at the same time without running out of hot water. Assumes a 2.1 GPM flow rate and an 8 minute shower length
    2.9 showers
    at the same time
    modal-tank-capacity
    tooltip
    Biggest tub this water heater will fill without running out of hot water. Assumes a 5.0 GPM flow rate, and a 67% fill level
    78 gallons
    max tub size
    modal-cost
    tooltip
    The estimated annual cost to operate this water heater in your location
    $287/year
    est. energy cost
    Based on location results for Columbus, OH 43215
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    Edit Location / Advanced Settings
    Product Details
    • Delivers 81-gallon first hour rating
    • 40,000 BTU input atmospheric vent design delivers up to 0.62 Uniform Energy Factor
    • Standard atmospheric vent installation with 3" or 4" B-vent, no power required
    • Patented eco-friendly Green Choice® Gas Burner design reduces NOx emissions by up to 33% and complies with Low-NOx emission requirements
    • Push-button piezo ignitor makes lighting pilot fast & easy
    • Intelligent electronic gas control provides precise temperature control and LED status indicator
    • Patented Blue Diamond® glass tank lining protects against corrosion
    • DynaClean™ automatic cleaning system protects against sediment build-up
    • Stainless steel CoreGard™ anode rod protects against corrosion longer than ordinary anodes
    • 6-year limited tank and parts warranty

      • The ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater is designed to deliver an economical performance that can lower your energy bills and also provide long-lasting value. Featuring a 50-gallon (nominal) tank and a 40,000 BTU gas burner, the GCG-50 Standard Vent delivers a first hour rating of 81 gallons and a recovery rate of 41 gallons per hour. It carries a 6-year limited tank warranty, and meets Low NOx emission requirements. Environmentally-friendly insulation and factory-installed heat trap nipples reduce heat loss for maximum energy savings. This ProLine® water heater is designed with A. O. Smith's superior commercial-grade tank protection. Advanced tank features include stainless steel CoreGard™ anode rod, Blue Diamond® glass lining and DynaClean™ automatic sediment-cleaning system, all designed to help protect the tank from the corrosive effects of water and extend the life of the water heater. This model also includes built-in Dry-Fire protection to protect the heating elements from damage during initial start up. A. O. Smith’s ProLine® water heaters are residential products built to commercial-grade standards and are only available for purchase through professional wholesalers and contractors.

    Specifications
    Tech Specs
    Nominal Gallon Capacity
    50 Gallons
    Rated Storage Volume
    48 Gallons
    UEF
    0.62
    Maximum BTUs
    40,000
    Power Source
    GAS
    Limited Tank Warranty
    6 Years
    Limited Parts Warranty
    6 Years
    T&P Relief Valve
    Yes
    Water Connection Location
    TOP
    Water Connection Size
    0.75"
    First Hour Rating
    81 Gallons
    ASME Certified
    No
    Blanket Included
    No
    Destination Country
    US
    Flue Diameter
    4.00
    Fuel Source
    NATURAL
    Height to Gas Valve
    12.50
    Height to T&P
    50.50
    Ignition Type
    Pilot with Piezo Igniter
    Installation Type
    INDOOR
    Application
    RESIDENTIAL
    Product Tier
    ProLine®
    Shipping Height 
    60.81"
    Shipping Length 
    25.13"
    Shipping Width 
    22.13"
    Side Loop
    No
    Dimension & Venting
    Type
    Water Heater
    Height
    57"
    Diameter
    21 in."
    Shipping Weight
    148lbs
    Vent Type
    Atmospheric Vent
    Maintenance & Troubleshooting
    Maintenance

    Residential ProLine® Series Atmospheric Vent Application and Installation

    Residential ProLine® Series Atmospheric Vent Lighting the Pilot

    Troubleshooting

    Residential ProLine® Series Atmospheric Vent Draft Test

    Residential ProLine® Series Atmospheric Vent No Hot Water

    Residential ProLine® Series Atmospheric Vent Status Code 1 Flash

    Residential ProLine® Series Atmospheric Vent Status Code 2 Flash

    Residential ProLine® Series Atmospheric Vent Status Code 4 Flash

    Residential ProLine® Series Atmospheric Vent Status Code 5 Flash

    Residential ProLine® Series Atmospheric Vent Status Code 7 Flash

    Residential ProLine® Series Atmospheric Vent Status Code 8 Flash

    Residential ProLine® Series Atmospheric Vent Status Code Light Continuous

    Marketing Videos
    Residential ProLine® Series Atmospheric Vent Features and Benefits
    Residential ProLine® Series Atmospheric Vent How It Works
    Find a Replacement
    Current Product
    Option 2
    ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater
    ProLine® XE Ultra-Low NOx Indoor 180,000 BTU Condensing Natural Gas Tankless Water Heater
    GCG-50
    ATI-340H
    current Product
    option 1
    Rebates up to $300 +
    Rebates up to $300 +
    Nominal Capacity
    50 Gallons
    Rated Storage Volume
    48 Gallons
    Diameter
    21 in."
    Width
    17.75"
    Depth
    25.25"
    11.25"
    Height
    57"
    23.625"
    Shipping Weight
    148lbs
    70lbs
    Power Source
    GAS
    GAS
    Limited Tank Warranty
    6 Years
    0 Years
    Limited Parts Warranty
    6 Years
    5 Years
    T&P Relief Valve
    Yes
    Water Connection Location
    TOP
    BOTTOM
    Water Connection Size
    0.75"
    First Hour Rating
    81 Gallons
    Thermal Efficiency
    0%
    0%
    All Reviews for ProLine® Atmospheric Vent (400 series)
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