Best 40 Gallon Gas Water Heater

Written by

Pop Expert

Looking for the Best 40 Gallon Gas Water Heater available to buy right now on Amazon but don’t want to have to do all the research on the pros and cons of the different types of 40 Gallon Gas Water Heater?

Pop Expert have put together this list of the top 10 selling 40 Gallon Gas Water Heater on Amazon – sorted by overall popularity and positive consumer reviews.

The Pop Expert list of top selling 40 Gallon Gas Water Heater is the ideal place to start when you are trying to find the Best 40 Gallon Gas Water Heater for your neeeds.

Popular 40 Gallon Gas Water Heater on Amazon

Details on the Best 40 Gallon Gas Water Heater

Bestseller No. 1
80,000 BTU Residential Indoor Natural Gas Tankless Water Heater, ORBEK 120 Volt On-demand Instant Hot Water Heater, Up to 3.6 GPM, CSA Certified Multiple Points of Use Water Heater
  • Endless On-Demand Hot Water: This gas tankless water heater offers a flow rate of up to 3.6 GPM and a heating capacity of 80,000 BTU. It efficiently serves up to 2-3 fixtures at once, ensuring a steady supply of hot water throughout your home.
  • Precise Temperature Control: Orbek's tankless water heater uses smart sensors to keep the water temperature within ±1℉ of your setting, providing a consistent and perfect bath every time, no matter the season.
  • CSA Certified Safety: ORBEK tankless water heater is built with high-quality materials for durability. and includes anti-scald, freeze, and dry-fire protection, making it a reliable choice for home hot water.
  • Energy & Cost Saving: Orbek tankless water heaters are highly energy efficient. Without a storage tank, tankless heaters eliminate heat loss and energy waste during the standby mode, saving you from expensive power and water costs.
  • Easy to Install: Installation is simple with standard 3/4” NPT connectors for most water pipes. A 3” diameter vent (not included) easily connects to the direct vent. Its compact size (13"L x 7"W x 20.5"H) saves space.
Bestseller No. 2
Ranein Natural Gas Tankless Water Heater with Vent Pipe, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater
  • Performance: The on-demand tankless water heater boasts a heating capacity of 100,000 BTU and a hot water flow rate of 4.3 gallons per minute (GPM). It can provide continuous hot water for 2-3 water supply points, making it sufficient to meet the hot water needs of a household's bathroom, kitchen, and bar area.
  • Upgrade features: Four Seasons Function: Automatically adjust the water temperature output based on the seasonal water temperature changes. Kitchen Function: Default water output temperature is 100°F, suitable for kitchen use. Bathtub Function: Adjustable water output quantity with a reminder when the set output quantity is reached, catering to various environmental needs.
  • No Waiting Required: Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30-minute preheating wait time, allowing you to have unlimited hot water on demand.
  • Save Money: The kit already includes the exhaust pipe, so you don't need to spend extra money on purchasing it separately. With an oxygen-free copper water tank, it reduces heat loss and lowers energy consumption. Applied with standard 1/2" NPT water fitting and gas inlet.
  • Recommendation: We strongly advise that all installations of the device adhere to local building and plumbing regulations at the installation location, and should be carried out by licensed professionals.
Bestseller No. 3
Rheem 72-40-2 240V / 4500W 40 Gallon Electric Water Heater
  • Rheemglas lined tank
  • R-Foam insulation
  • Anode Rod protects against corrosion
  • Automatic temperature control thermostat
  • Direct immersion heating element
Bestseller No. 4
9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005(12-month warranty)
  • 【NEW Upgraded Replacement】- This 9003542 is a new upgraded water heater pilot assembly. Made of premium material. It's designed for Natural gas water heaters and has a temperature setting of 190 degrees, have stable and durable performance.
  • 【High Quality Replacement Part】- 9003542 NAT gas pilot assembly include 22" gas pilot tube, 22-1/2" thermocouple, 21-1/2" ignitor. It's a perfect replacement for your natural gas water heater, make your water heater work normally again.
  • 【Perfect compatibility】- This pilot assembly compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX natural gas water heaters, replaces part number 100109295, 183824-190, 9003530, 9003542005 and AP4867015, can perfect compatible with the specified water heater models, such as 6-30-Yors, 6-30-Yors-d, 6-30-Yort-d FCV, GCV, GVR, XCV and XVR serials; please check the complete models we listed below.
  • 【About Installation】- Prepare tools: screwdriver, pliers; Before you replace the NAT gas water heater pilot assembly, you should cut the gas supply, and take necessary protection measures. Please notice that do not bend the gas pilot tube repeatedly to avoid break it.
  • 【12-month Warranty】- Our 9003542 pilot assembly is made of premium material and have a super long service life. So we are very confident to provide you a 12-month warranty. If you have any problem with our product, please feel free to contact us through amazon, we will provide you a satisfactory solution within 12 hours.
On Sale!Bestseller No. 5
Natural Gas Tankless Water Heater, MIZUDO Up to 3.6 GPM 80,000 BTU Indoor Installation Instant Hot Water Heater
  • Quality Certification: MIZUDO tankless gas water heater has passed CSA certification and has protection functions such as overheating protection and accidental flameout protection.
  • Endless Hot Water: Up to 3.6 GPM hot water flow, precise temperature control, no water temperature sandwich.
  • Premium and Durable: Adopt oxygen-free copper water tank, reduce heat loss, high efficiency and durability.
  • Compact Design: Dimensions are H 20.5'' x W 13.0'' x D 7.0''. Save over 50% of available space compared to tank water heater.
  • Energy Conservation: The UEF is higher than 0.81 and consumes energy only during heating.

Newest 40 Gallon Gas Water Heater

New
State Proline Series 40 Gallon Capacity 4.5 kW Heating Input Short Electric Water Heater
  • 55 Gallons per Hour First Hour Rating
  • 0.92 Uniform Energy Factor Rating
  • 21 Gallons per Hour Recovery at 90°F Rise
  • Dimensions: 49-3/4" H x 20-1/2" D
New
State Proline Series 40 Gallon Capacity 4.5 kW Heating Input Tall Electric Water Heater
  • 53 Gallons per Hour First Hour Rating
  • 0.92 Uniform Energy Factor Rating
  • 21 Gallons per Hour Recovery at 90°F Rise
  • Dimensions: 61-1/4" H x 18" D
New
Lochinvar 40 Gallon - 40,000 BTU Energy Saver Residental Water Heater (Nat Gas)
  • Capacity (Gallons): 40, BTU Input: 40000, Fuel Type: Natural Gas, ASME: No, Water Connection: 3/4"
  • Gas Connection: 1/2", Vent Size: 3"/4", Weight (lbs): 138 lbs, Warranty: 6 Year Tank / 6 Year Parts Limited, Height (Inches): 61.75"
  • Diameter (Inches): 18"
New
Bradford White 40 Gallon - 36,000 BTU Defender Safety System High Efficiency Residential Atmospheric Water Heater (LP Gas)
  • Intended Household: 2-3 Person, Fuel Type: Propane, Capacity (Gallons): 40, BTU Input: 36000, 1st Hour Delivery (Gallons): 76
  • Venting: Atmospheric, Height (Inches): 60.125", Diameter (Inches): 20", Weight (lbs): 136 lbs, Warranty: 6-Year Limited Tank/ 6-Year Limited on Component Parts
  • Energy Factor: 0.62, Energy Star Rated: No, Max Altitude (Feet): 2000, Application: Plumbing, Water Connection: 3/4"
  • Vent Size: 3 x 4, Recovery Efficiency: 80%
New
Bradford White 40 Gallon - 35,000 BTU Defender Safety System High Efficiency Residential Atmospheric Water Heater (LP Gas)
  • Intended Household: 2-3 Person, Fuel Type: Propane, Capacity (Gallons): 40, BTU Input: 35000, 1st Hour Delivery (Gallons): 74
  • Venting: Atmospheric, Height (Inches): 51.5", Diameter (Inches): 22", Weight (lbs): 141 lbs, Warranty: 6-Year Limited Tank/ 6-Year Limited on Component Parts
  • Energy Factor: 0.62, Energy Star Rated: No, Max Altitude (Feet): 2000, Application: Plumbing, Water Connection: 3/4"
  • Vent Size: 3 x 4, Recovery Efficiency: 80%