Select® 40-Gallon Gas Water Heater

Model GSX-40-BCS 400
4.1 out of 5 Customer Rating
Select® 40-Gallon Gas Water Heater is rated 4.7 out of 5 by 1021.
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Capacity (Gallons)
Limited Tank Warranty
Height Classification
Fuel Source
Advanced Options
First Hour Rating
Maximum BTU's
Side Loop
Diameter
Select® 40-Gallon Gas Water Heater
Model GSX-40-BCS 400
4.1 out of 5 Customer Rating
Select® 40-Gallon Gas Water Heater is rated 4.7 out of 5 by 1021.
  • y_2026, m_8, d_26, h_8
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.48
  • cp_2, bvpage2n
  • co_hasreviews, tv_171, tr_850
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What to Expect from this Model
modal-clock
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Number of minutes you can enjoy a shower before running out of hot water. Assumes a 2.1 GPM flow rate
25.5 minutes
single shower length
modal-frame
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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
3.2 showers
back-to-back
modal-frame
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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
2.4 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
61 gallons
max tub size
modal-cost
tooltip
The estimated annual cost to operate this water heater in your location
$306/year
est. energy cost
Based on location results for Columbus, OH 43215
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Edit Location / Advanced Settings
Specifications
Tech Specs
Nominal Gallon Capacity
40 Gallons
Rated Storage Volume
38.2 Gallons
UEF
0.58
Maximum BTUs
40,000
Power Source
GAS
Limited Tank Warranty
10 Years
Limited Parts Warranty
10 Years
T&P Relief Valve
Yes
Water Connection Location
TOP
Water Connection Size
0.75"
First Hour Rating
67 Gallons
ASME Certified
No
Blanket Included
No
Destination Country
US
Flue Diameter
4.00
Fuel Source
NATURAL
Height to T&P
41.25
Ignition Type
Pilot with Piezo Igniter
Installation Type
INDOOR
Application
RESIDENTIAL
Shipping Height 
51.31
Shipping Length 
26.13
Shipping Width 
23.13
Side Loop
No
Dimension & Venting
Type
Water Heater
Height
47.75"
Diameter
22"
Shipping Weight
135 lbs
Vent Type
Atmospheric Vent
Height to Gas Valve
12.5"
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
Product Comparison
Current Product
Option 2
Select® 40-Gallon Gas Water Heater
Adapt® SC Standard Condensing 180,000 BTU Natural Gas Tankless Water Heater
GSX-40-BCS
STM-180M-N
current Product
option 1
Rebates up to $300 +
Rebates up to $300 +
Nominal Capacity
40 Gallons
1 Gallons
Rated Storage Volume
38.2 Gallons
Diameter
22"
Width
17.12"
Depth
25.5"
11.85"
Height
47.75"
32.46"
Shipping Weight
135lbs
93lbs
Power Source
GAS
GAS
Limited Tank Warranty
10 Years
0 Years
Limited Parts Warranty
10 Years
5 Years
T&P Relief Valve
Yes
Water Connection Location
TOP
BOTTOM
Water Connection Size
0.75"
0.75"
First Hour Rating
67 Gallons
Thermal Efficiency
0%
0%
All Reviews for ProLine® Atmospheric Vent (400 series)
Rated 5 out of 5 by from Great water heater Heats water fast and efficient. Would recommend so to have 10 year warranty.
Date published: 2026-04-26
Rated 5 out of 5 by from So far, so good Needed to replace a 65 gallon. Able to find comparable solution with 50 gallon plus a booster. Could not tell the difference.
Date published: 2026-04-26
Rated 5 out of 5 by from Performs silently and proficiently. My water heater was installed in August 2024. I neglected to register the item but am doing so now. It has preformed well with no apparent problems the year and one half it has been installed.
Date published: 2026-04-23
Rated 5 out of 5 by from Great features The system heats water quickly and maintains a consistent temperature, even during back-to-back showers or when running multiple appliances. The installation process was smooth and professional thanks to Joseph Simpson & Son Plumbing & Heating in Southern Maryland. Overall, I'm very satisfied with this water heater. It's reliable, efficient, and provides great performance for everyday use. I would definitely recommend investing in a new water heater if your current one is outdated or struggling to keep up.
Date published: 2026-03-18
Rated 5 out of 5 by from Great features I just bought the State Pro-Line unit today, however, so far so good.
Date published: 2026-03-16
Rated 5 out of 5 by from Satisfied Second one purchased. Lasted 10 yrs. Never had a problem.
Date published: 2026-03-10
Rated 5 out of 5 by from New gas water heater Super Happy with my new water heater! Joslin's plumbing Installed it and did an excellent job. Took a super hot bath and could not be happier!
Date published: 2026-01-28
Rated 5 out of 5 by from Well made quality water heater. Super excited about the water heater. Well made quality water heater.
Date published: 2026-01-23
Rated 5 out of 5 by from I put a State 75 gallon water heater in my newly built house back in June of 2003. 22.5 years later I'm putting another one in! Amazing quality built product . I did not want to put any other brand in but STATE.
Date published: 2026-01-06
Rated 5 out of 5 by from Plenty of Hot Water So far, so good. We've had this about 6 months or so. We will see if it outlasts the last one (a GE that I had for 14 years).
Date published: 2025-12-30
Rated 5 out of 5 by from Great features Bought this last week and so far it has exceeded expectations.
Date published: 2025-10-07
Rated 5 out of 5 by from Very Very happy with product Excellent product.....very happy with State water heaters and the Quality / Craftsmanship they do
Date published: 2025-09-28
Rated 5 out of 5 by from Loooong life! My original builder-installed State Select GS6-50-BRT was still going strong after 18.5 years when I broke the drain valve. My home warranty decided to replace the entire heater rather than just the valve. I'm kind of disappointed that they replaced the whole unit because I wanted to see how long I could make it last. All I ever did maintenance-wise was to open the drain valve every three months for < 30 seconds to flush out sediment until the water ran clear. As this model had only a 6-year warranty, I didn't expect it to last more than 12-15 years, so I was pleasantly surprised when it kept going well past that. Because of my 100% long and trouble-free experience with this make and model, I insisted on the identical replacement unit. I trust I will have reliable hot water for the next 18+ years.
Date published: 2025-09-04
Rated 5 out of 5 by from Quiet and good features Purchased and installed and very pleased with the product.
Date published: 2025-08-18
Rated 5 out of 5 by from Good product. 2nd of this water heater model by the same company last one made it 9 years, hope this one does too. Great installer, and great service company.
Date published: 2025-07-20
Rated 5 out of 5 by from Well built and efficient. This handles all our hot water needs.
Date published: 2025-06-17
Rated 5 out of 5 by from New Water Heater Large tank, fast recovery of hot water, no issues so far.
Date published: 2025-06-14
Rated 5 out of 5 by from Good features. Great product. Second water heater of this brand in my lifetime.
Date published: 2025-06-14
Rated 5 out of 5 by from Just installed Looks great and works great, happy with the performance.
Date published: 2025-06-06
Rated 5 out of 5 by from Great Tank! Had this Water Heater installed 4/21/2025, so far so good, lots of hot water and very efficient!
Date published: 2025-05-04
Rated 5 out of 5 by from Great Product! Great Quality and heats quickly. Excellent quality with metal fittings.
Date published: 2025-04-18
Rated 5 out of 5 by from Water heater It’s a great product really easy to install good design
Date published: 2025-04-13
Rated 5 out of 5 by from Last State HWH was still working after 17 years. Happy with installer.
Date published: 2025-04-06
Rated 5 out of 5 by from Excellent Came with our new home. Came with our new home. Came with our new home.
Date published: 2025-03-31
Rated 5 out of 5 by from Great features I like the quick heat up and drip pan. Also like the vacation setting
Date published: 2025-03-22
Rated 5 out of 5 by from Great unit Doc Dancer employees did excellent job Doc Dancer Great job waterheater well made thanks
Date published: 2025-02-06
Rated 5 out of 5 by from Very efficient We bought this a year ago and very happy with it.
Date published: 2025-01-26
Rated 5 out of 5 by from Excellent build quality Had my plumbing contractor install this gas water heater to replace an improperly installed one! Now my home is up to code and we now have plenty of hot water! The water heater is a commercial grade, well built and must be well insulated. It is energy efficient, does not cycle on as much as the old one.
Date published: 2024-11-05
Rated 5 out of 5 by from Great gas tank water heater First one i purchased 11years ago and it worked great. This new i purchased and I know will stand up just like the first one I purchased.
Date published: 2024-11-03
Rated 5 out of 5 by from Have only had for a month; working great Have only had for a month but everything is working great. Feel extremely comfortable with the company who installed. There were several different things that were not up to code with the old one. This unit has been inspected and passed city code. Have already referred to a neighbor. Very happy!!!
Date published: 2024-10-29
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