ProLine® Low NOx 50-Gallon Direct Vent FVIR-compliant Natural Gas Water Heater

Model GS6-50-YBDSL 300
3.1 out of 5 Customer Rating
ProLine® Low NOx 50-Gallon Direct Vent FVIR-compliant Natural Gas Water Heater is rated 4.7 out of 5 by 108.
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Capacity (Gallons)
Fuel Source
Height Classification
Advanced Options
First Hour Rating
Side Loop
Maximum BTU's

  • Meets Your Hot Water Demands—Delivers a 77-gallon first hour rating
  • Energy Efficient - 40,000 BTU input direct vent design delivers up to 0.66 Uniform Energy Factor
  • Eco-Friendly Design Reduces Emissions—Patented Green Choice® Gas Burner design reduces NOx emissions by up to 33% and complies with Low NOx emission requirements

    • ProLine® Low NOx 50-Gallon Direct Vent FVIR-compliant Natural Gas Water Heater
    Model GS6-50-YBDSL 300
    3.1 out of 5 Customer Rating
    ProLine® Low NOx 50-Gallon Direct Vent FVIR-compliant Natural Gas Water Heater is rated 4.7 out of 5 by 108.
    • y_2025, m_9, d_9, h_6
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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
    32.4 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
    4.1 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
    77 gallons
    max tub size
    modal-cost
    tooltip
    The estimated annual cost to operate this water heater in your location
    $269/year
    est. energy cost
    Based on location results for Columbus, OH 43215
    modal-edit
    Edit Location / Advanced Settings
    Product Details
    • Meets Your Hot Water Demands—Delivers a 77-gallon first hour rating
    • Energy Efficient - 40,000 BTU input direct vent design delivers up to 0.66 Uniform Energy Factor
    • Eco-Friendly Design Reduces Emissions—Patented Green Choice® Gas Burner design reduces NOx emissions by up to 33% and complies with Low NOx emission requirements
    • Simple Ignition—Push-button piezo ignitor makes lighting pilot fast & easy
    • Recirculation Taps Included—Includes side mounted recirculation taps for easy installation with combination space heating/potable water heating applications
    • Corrosion Protection—Patented Blue Diamond® glass tank lining protects against corrosion
    • Auto-Cleaning Feature—DynaClean™ automatic cleaning system protects against sediment build-up
    • Long-Lasting Anode—Stainless steel CoreGard™ anode rod protects against corrosion longer than ordinary anodes
    • Simple Drainage—Commercial-grade brass drain valve for durable and easy operation
    • Peace of Mind—6-year limited tank and parts warranty for added peace of mind

      • The FVIR-compliant ProLine® Direct Vent 50-Gallon Gas Water Heater draws air from outside the home, eliminating problems caused by insufficient indoor ventilation. The GS6-50-YBDSL can be vented up to 80 inches from the outside wall with no electrical power needed.

      This ProLine® Direct Vent model has a 50-gallon (nominal) tank and a 40,000 BTU gas burner to deliver a first hour rating of 77 gallons and a recovery rate of 43 gallons per hour.

      A patented Green Choice® eco-friendly burner design reduces NOx emissions up to 33% and complies with Low NOx emission requirements of 40 ng/J. Environmentally-friendly insulation and factory-installed heat trap nipples reduce heat loss for maximum energy savings.

      The GS6-50-YBDSL 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
    0.66
    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"
    Emissions
    Low NOx
    First Hour Rating
    77 Gallons
    ASME Certified
    No
    Blanket Included
    No
    Destination Country
    US
    Flue Diameter
    4.00
    Fuel Source
    NATURAL
    Height to T&P
    51.75
    Ignition Type
    Pilot with Piezo Igniter
    Installation Type
    INDOOR
    Application
    RESIDENTIAL
    Shipping Height 
    71.5
    Shipping Length 
    31.5
    Shipping Width 
    23.5
    Side Loop
    Yes
    Dimension & Venting
    Type
    Water Heater
    Height
    60"
    Diameter
    22"
    Shipping Weight
    200 lbs
    Vent Type
    Direct Vent
    Find a Replacement
    Current Product
    Option 2
    ProLine® Low NOx 50-Gallon Direct Vent FVIR-compliant Natural Gas Water Heater
    Adapt™ SC Standard Condensing 199,000 BTU Natural Gas Tankless Water Heater
    GS6-50-YBDSL
    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
    28.63"
    11.85"
    Height
    60"
    32.46"
    Shipping Weight
    200lbs
    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
    TOP
    BOTTOM
    Water Connection Size
    0.75"
    0.75"
    First Hour Rating
    77 Gallons
    Thermal Efficiency
    0%
    0%
    All Reviews for ProLine® Direct Vent (300 series)
    Rated 5 out of 5 by from Works great! Our plumber recommend and installed this water. It's been working great. So glad he was able to get one so quickly so we didn't have to take another cold shower.
    Date published: 2023-03-10
    Rated 5 out of 5 by from No issues Installed by Davidson Homes LLC as part of new construction
    Date published: 2023-02-26
    Rated 5 out of 5 by from Our installer recommended this model. We just had it installed today. We trust it will serve us well.
    Date published: 2023-01-04
    Rated 5 out of 5 by from Quiet an plenty of HOT water My last unit was a State, installed by our builder 15 1/2 years ago. Always hot water and never a problem. Replaced with an upgraded State, confident we will receive many years of great service.
    Date published: 2022-12-19
    Rated 5 out of 5 by from Reliable Hot Water We are happy to have quick hot water, and plenty of it.
    Date published: 2022-10-14
    Rated 5 out of 5 by from Great Quality and Quickly Heats I just had it installed early this morning but it is already heating and it looks great. Hearty construction! Much better than the tank I had them replace. One thing I would change is the venting. I kind of liked the solid wall of my last unit verses the "expandable flex tube" look. Other than that I love it. It was expensive. I guess I will see how it lasts. My last one was from 1998 and I did great maintenance but it was not this brand.
    Date published: 2022-01-14
    Rated 5 out of 5 by from Perfect I've had for a month, and it's perfect! So much hot water! Never gets cold. The natural gas heats up so fast!!! Thank you Jesus!!!
    Date published: 2021-09-09
    Rated 5 out of 5 by from Great Product!!!! This unit replaces an identical one I had for 10 years. Great product. Did not give me any trouble.
    Date published: 2021-03-05
    Rated 5 out of 5 by from Reliable, performs great! We got this water heater when we purchased our brand new home three years ago. The water is always nice and hot, regardless if it is summer or winter. We had a State heater at our previous home, but it would not heat the water as high as we would like in the summer, for some reason. Even when we turned the thermostat up during the summer! So weird! We were told that State heaters were the best. The GS6-50-YBDS we now have has restored our confidence in State products.
    Date published: 2020-12-30
    Rated 5 out of 5 by from Tank lasted 17 years. The original tank lasted 17 years. Replaced with the exact same one. In fact I purchased it 5 years ago but didn't need it until now. I installed the original but decided to have a plumber install the new one. Plumber didn't know how to do a Direct vent so I did the vent work after he plumbed it.
    Date published: 2020-10-30
    Rated 5 out of 5 by from American made Bought and installed from the gas company. Makes water hot.
    Date published: 2020-08-22
    Rated 5 out of 5 by from For Direct Vent this was a charm This was a little tough to install, but the flexible venting ducts that State provided were nice to see since they are flexible and will give you some leeway during install. Very well written manual that if followed properly will result in an excellent installation. I suppose the big black venting pipe on the side helps deliver a good efficient heating process to deliver hot water experience. But be ready to deal with that Big Black venting pipe on the back/side of the unit... It adds at least 2 inches to your equation. If you are getting Direct Vent Hot Water heater get one made by State, since the venting pipe is flexible and allows you to have an easier install.
    Date published: 2020-07-23
    Rated 5 out of 5 by from Good product Good product in size for single family. Easy to use
    Date published: 2020-07-16
    Rated 5 out of 5 by from Improvement over State 12 year old hot water heate Plumbers depend on them, and I have used State hot water heaters for over 20 years
    Date published: 2020-06-23
    Rated 5 out of 5 by from Easy to understand instructions and efficient This is my third State product in 33 years! Not been disappointed yet
    Date published: 2020-06-05
    Rated 5 out of 5 by from Recommendation by WF Plumbing We got it installed today and everything seems to be working fine. The installers were great, very efficient and knowledgeable.
    Date published: 2020-03-31
    Rated 5 out of 5 by from I love Natural Gas water heaters, this is the best This is this is the best gas water heater, quick recovery and always supplies consistant hot water!
    Date published: 2020-03-27
    Rated 5 out of 5 by from Just had this installed last week. Product looks good and is working well. So far so good. Had the last heater 18 years. I hope this one last that long!
    Date published: 2020-03-26
    Rated 5 out of 5 by from STATE IS GREAT! The product is easy to install and use. I love all of the new upgraded features. The water temperature is just right and can easily be adjusted. Great product!
    Date published: 2020-03-19
    Rated 5 out of 5 by from So far so good. A few friends of mine who are plumbers picked this unit up for me from their supply store. They were able to remove my old unit and installed this unit which fit like a glove with the existing pipes and connections.
    Date published: 2020-01-30
    Rated 5 out of 5 by from Big improvement over 21 year old unit Old Penfield started leaking so I needed a replacement right away. I found this one without too much effort. Ran into a bit of an obstacle with the distributor giving me the runaround with the tankless pitch and “this unit is no longer made”, but after leaving, a quick web search found this unit at the same distributor at a different location. Frustrated I had to travel 15 miles to a different location to get it, but that’s not a reflection on the manufacturer. A bit of sticker shock since buying my last water heater 20 years ago for my last house, but as an emergency replacement, it’s not like I had much of a choice. Installation fairly straightforward, but found the direct vent style has changed in that an intake duct now runs along the outside of the heater from the top to bottom, along with a larger diameter tank. These appear to be nice upgrades, but they come at the cost of space. If replacing with an old unit, be sure to have plenty of clearance (2-3” for intake duct, 2” more in diameter over 1998 Penfield). I could see this being a nightmare for someone with a small pad or tight fitting closet. On the positive side, the height was only slightly taller than the original heater and didn’t affect the wall mounting. The vent outlet is of good quality, better and more attractive than original. Startup was also straightforward, sure wish there was a way to reduce the number of button presses to light the pilot. The water came up to temperature quickly and to no surprise, water flowing to the faucet warms up noticeably faster than original heater. It’s only been installed a week and while I don’t have data, it definitely seems like it is burning less gas than the original. I rated it a 4 in value really only due to purchase price. Here’s hoping the savings in energy offset the purchase price quickly.
    Date published: 2019-11-27
    Rated 5 out of 5 by from Great Product After 16 years our State 40 gallon water heater still worked but was showing some signs of aging. We replaced it with another State 40 gallon water heater. It has some new, improved features which should produce even more efficient results. State makes a great product.
    Date published: 2019-10-21
    Rated 5 out of 5 by from Excellent fit for an older State Unit After 23 years our original equipment (by builder) direct vent State 40 gals unit failed. I have no complaint as that's almost 5 times the original warranty period of 5 years! The replacement GS6-40-YBDS unit, of the same capacity, worked with the existing direct vent opening through our home's siding. Sure saved me a lot of siding patch work! Great that after 23 years State still has a unit that matches the dimensions of a unit installed in '96 (actually manufactured in '94).
    Date published: 2019-10-17
    Rated 5 out of 5 by from Works well Purchased this water heater to replace another State water heater that was 13 years old. If this one is any indication of the last one, it is very good.
    Date published: 2019-08-08
    Rated 5 out of 5 by from Review Currently, we have only utilized this system for almost 60 days now; however, no issues as of yet. Definitely, love the ease of adjusting the water temperature on the unit!
    Date published: 2019-07-12
    Rated 5 out of 5 by from Water stays it’s temperature at all times We just bought this property and the this water heater was installed so far it’s get the water stays the same for a long period of time.
    Date published: 2019-07-06
    Rated 5 out of 5 by from Well Built, Great Product Exceptional water heater, very hot and very inexpensive to operate
    Date published: 2019-07-05
    Rated 5 out of 5 by from keeps water at exactly right temperature I bought this and had it installed when ours went out and it is extremely efficient and we are glad we bought it.
    Date published: 2019-06-19
    Rated 5 out of 5 by from Great product Replaced this item with the same one. My old one went bad. Do I replaced it with the same product. Very satisfied with this brand.
    Date published: 2019-03-29
    Rated 5 out of 5 by from moved here in august of 18 hot water was very slow, but with new heater it is much faster.
    Date published: 2019-03-21
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