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

Model GS6-50-BCUT 450
5 out of 5 Customer Rating
ProLine® Ultra-Low NOx 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater is rated 4.5 out of 5 by 81.
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Capacity (Gallons)
Height Classification
UEF
Advanced Options
Limited Tank Warranty
Diameter

  • Meets Your Hot Water Demands—Delivers an 84-gallon first hour rating
  • Energy Efficient—40,000 BTU input atmospheric vent design delivers up to 0.64 Uniform Energy Factor
  • Green Choice® Burner—Ultra-Low NOX Green Choice® gas burner meets or exceeds emission requirements in California & Utah

    • ProLine® Ultra-Low NOx 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater
    Model GS6-50-BCUT 450
    5 out of 5 Customer Rating
    ProLine® Ultra-Low NOx 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater is rated 4.5 out of 5 by 81.
    • y_2025, m_9, d_24, h_6
    • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
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    Product Details
    • Meets Your Hot Water Demands—Delivers an 84-gallon first hour rating
    • Energy Efficient—40,000 BTU input atmospheric vent design delivers up to 0.64 Uniform Energy Factor
    • Green Choice® Burner—Ultra-Low NOX Green Choice® gas burner meets or exceeds emission requirements in California & Utah
    • Easy-to-Use Controls—Intelligent electronic gas control provides precise temperature control and LED status indicator
    • Simple Ignition—Push-button piezo ignitor makes lighting pilot fast & easy
    • Corrosion Protection—Patented Blue Diamond® glass tank lining protects against corrosion
    • Auto-Cleaning Feature—DynaClean™ automatic cleaning system protects against sediment build-up
    • Peace of Mind—6-year limited tank and parts warranty for added peace of mind

      • The ProLine® 50-Gallon Ultra-Low NOx Atmospheric Vent Tall Natural Gas Water Heater delivers an efficient, reliable performance with an innovative design that protects against accidental ignition of flammable vapors.

      The GS6-50-BCUT features a 50-gallon (nominal) tank and a 40,000 BTU gas burner to deliver a first-hour rating of 84 gallons and a recovery rate of 42 gallons per hour. This model uses a patented Green Choice® eco-friendly burner and meets Ultra-Low NOx emission requirements.

      This ProLine® water heater features State’s advanced tank protection, including a stainless steel CoreGard™ anode rod, Blue Diamond® glass lining, and DynaClean™ automatic sediment-cleaning—designed to help protect the tank from the corrosive effects of water and extend the life of the water heater, which is backed by a 6-year limited tank and parts warranty.

      State 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
    0.64
    Maximum BTUs
    40,000
    Power Source
    GAS
    Limited Tank Warranty
    6 Years
    Limited Parts Warranty
    6 Years
    T&P Relief Valve
    Yes
    Water Connection Size
    0.75"
    Emissions
    Ultra-Low NOx
    First Hour Rating
    84 Gallons
    ASME Certified
    No
    Blanket Included
    No
    Destination Country
    US
    Flue Diameter
    4.00
    Fuel Source
    NATURAL
    Height to T&P
    50.50
    Ignition Type
    Pilot with Piezo Igniter
    Installation Type
    INDOOR
    Application
    RESIDENTIAL
    Shipping Height 
    61
    Shipping Length 
    26.63
    Shipping Width 
    23.13
    Side Loop
    No
    Dimension & Venting
    Type
    Water Heater
    Height
    57"
    Diameter
    22"
    Shipping Weight
    161 lbs
    Vent Type
    Atmospheric Vent
    Height to Gas Valve
    11"
    Maintenance & Troubleshooting
    Maintenance

    Residential Series Atmospheric Vent Lighting the Pilot

    Troubleshooting

    Residential Series Atmospheric Vent Draft Test

    Residential Series Atmospheric Vent No Hot Water

    Residential Series Atmospheric Vent Status Code 1 Flash

    Residential Series Atmospheric Vent Status Code 2 Flash

    Residential Series Atmospheric Vent Status Code 4 Flash

    Residential Series Atmospheric Vent Status Code 5 Flash

    Residential Series Atmospheric Vent Status Code 7 Flash

    Residential Series Atmospheric Vent Status Code 8 Flash

    Residential Series Atmospheric Vent Status Code Light Continuous

    Marketing Videos
    Residential Series Atmospheric Vent Application and Installation
    Residential Series Atmospheric Vent Features and Benefits
    Residential Series Atmospheric Vent How It Works
    Find a Replacement
    Current Product
    Option 2
    ProLine® Ultra-Low NOx 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater
    Adapt™ SC Standard Condensing 199,000 BTU Natural Gas Tankless Water Heater
    GS6-50-BCUT
    STM-199M-N
    current Product
    option 1
    Rebates up to $300 +
    Rebates up to $300 +
    Nominal Capacity
    50 Gallons
    1 Gallons
    Rated Storage Volume
    48 Gallons
    Diameter
    22"
    Width
    17.12"
    Depth
    25.75"
    11.85"
    Height
    57"
    32.46"
    Shipping Weight
    161lbs
    93lbs
    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
    BOTTOM
    Water Connection Size
    0.75"
    0.75"
    First Hour Rating
    84 Gallons
    Thermal Efficiency
    0%
    0%
    All Reviews for ProLine® Ultra-Low NOx Atmospheric Vent (450 series)
    Rated 5 out of 5 by from 2 hours ago will see how long it lasts don't know what else to say yet
    Date published: 2025-04-18
    Rated 5 out of 5 by from Water heater Wanted to replace heater with same brand last state water was installed in 2004 no problems still was working fine . It was time for new.
    Date published: 2024-10-16
    Rated 5 out of 5 by from I like the new pilot lighting feature. I like the new pilot lighting feature. I like the newer technology. I like the old one that this one is replacing. It was also a state.
    Date published: 2024-09-11
    Rated 5 out of 5 by from supplies water to the entire house I bought the water heater a month ago and so far it exceeding my expectations of providing hot water to every faucet in the house in a very timely matter
    Date published: 2023-07-07
    Rated 5 out of 5 by from We bought this unit to replace an old water heater and so far so good.
    Date published: 2022-10-04
    Rated 5 out of 5 by from Great Water Heater We replaced out old water heater with this one and we are very pleased with it!
    Date published: 2022-08-08
    Rated 5 out of 5 by from We bought this Water Heater 3 years ago and it works GREAT!
    Date published: 2022-07-20
    Rated 5 out of 5 by from State heater reliability I just got this installed. I have heard great reviews about it in terms of electronics and reliability
    Date published: 2022-05-29
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