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
Rheem PROE40 T2 RH95 40-Gallon Professional Classic Water Heater; Dual 4500-Watt Heating Elements; 240VAC; Automatic Thermostat; Over-temperature Protector; Temperature and Pressure Valve Included
- 40 Gal. tank provides ample hot water for households with 2 people to 4 people
- Electric water heater is easy to maintain
- Delivers 55 Gal. of hot water in the first hour
- Requires a 240-Volt connection for installation
- 0.93 uniform energy factor signifies an energy efficient water heater
On Sale!Bestseller No. 2
Ranein Natural Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
- Performance: The on-demand tankless water heater boasts a heating capacity of 80,000 BTU and a hot water flow rate of 3.6 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.
- 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.
- Provides 4 modes: Dish mode(100℉), Fruit mode(95℉), Elderly mode(104℉) and Infant mode(107℉). More convenient for you to use.
- 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.(Not recommended for areas over 2,000 feet)
$299.00
−$59.83
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Bestseller No. 3
Tankless Water Heater Natural Gas,4.74GPM 18L Indoor,Instant Hot Gas Water Heater,Constant Natural Water Heater with Fahrenheit Digital Display,Multi-Protection (Black)
- 【Tankless Water Heater】- Natural Gas water heater tankless Steady Steady Temperature Control with more safety protection such as flame failure device,anti-freezing protection,over heating protection,Just need 3.6PSI of water pressure,4.74gallons of hot water can be output per minute.The maximum temperature raise is 167°F,Applicable only Natural Gas（LNG)
- 【Efficient & Energey Saving】-The 4.74 GPM Instant Natural Gas Water Heater ,Maximum power output 68000btu/hour,on-demand hot water for 2-3 points simultaneous water supply for bathroom,kitchen hot water demand，Natural Gas Water Heater exchanger and main burner are desinged with advanced combustion technology to decrease gas consumption and burning noise.
- 【Quality Material】-This of ours Water Heater Crafted from stainless steel, our Propane water heater exhibits high temperature resistance and corrosion resistance. It also features a built-in oxygen-free copper water tank, reduce heat loss ensuring a prolonged service life.with with LED smartdigital display effortlessly adjust the temperature between 86°F-167°F according to your preferences.
- 【Easy Assemble and Use】-Applied with standard 1/2" NPT water fitting and gas inlet, comes with 2.5" horizontal vent pipe for quick installation.Note: For normal operation, this product must be installed with proper ventilation and a smoke exhaust pipe.
- 【Widely Application 】-Save over 50% of available space compared to tank water heater.for both bathroom and kitchen hot water demand. great for home,small cabins and remote apartments indoor installation. without the need to install an expansion tank,Note: In cold weather, if the water heater is not used for a long time, it is necessary to open the pressure relief valve to drain the residual water in the water heater.
Bestseller No. 4
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
On Sale!Bestseller No. 5
Natural Gas Tankless Water Heater, MIZUDO Indoor Installation Max 3.6 GPM 80,000 BTU On Demand Instant Hot Water Heater, CSA Certified 3/4" NPT for 2-3 Fixtures Whole Family or Apartment Use
- Continuous Hot Water for Multi-Tasking: Mizudo tankless water heater provides hot water within 10 seconds at 3.6 GPM and 80,000 BTU, suitable for homes with bathrooms using 2-3 low-flow fixtures
- Energy Efficient Operation: On-demand heating, tankless water heater only consumes gas during use. Oxygen-free copper heat exchanger provides faster heating than standard steel models
- Third-Party Certified Safety: All tankless water heaters gas are UL listed and CSA certified to meet US safety standards for gas appliances. Includes 2-year whole unit coverage and 5-year for heat exchanger
- Integrated Protection System: This natural gas tankless water heater is provided with built-in safeguards such as freeze protection, leak detection, overheat cutoff, and wind-resistant ignition
- US Home Compatibility: The gas water heater indoor is compact 20.5 x 13.0 x 7.0 in. Natural gas powered indoor unit. Operates on 120V power with 3/4" NPT connectors. UEF >0.81
$399.00
−$100.02
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Newest 40 Gallon Gas Water Heater
New
Heat Pump Water Heater, Addon to a hot water tank. Saves 70% Energy,3-ton,Residential & Commercial
- Heat Pump Water Heater with superhigh 40,000 BTU/hr heating
- Saves 70% (COP of 3) on energy costs compared to gas or electric heaters
- Residential & Commercial water heating
- Appropriate for adding to 40Gal to 120Gal Tank
- Provides ample hot water for homes
New
16ft Mobile Concession Trailer with Burner Gas Stove, Flat Griddle, Sinks, Fire Suppression, Range Hood, Water Tanks, Generator & LED Lighting – Food Truck Kitchen for Street Food & Events
- ✅Fully Equipped Commercial Kitchen: Includes a burner countertop gas stove, deep fryer, flat-top griddle (temperature-controlled), commercial range hood, and fire suppression system—everything you need to start cooking right away.
- ✅ Built-In Sink Setup with Hot/Cold Water: Comes with three stainless steel sinks and a water heater, plus a 12V CE-certified water pump for consistent hot and cold flow. Meets most health and safety codes.
- ✅ Durable & Road-Ready Design: Constructed with a reinforced torsion axle (4,400 lb load per axle), composite wall panels, heavy-duty jacks, bumper with taillight system, and plug-and-play taillight connector for safe towing.
- ✅ Self-Sufficient Operation: Powered by an included generator and 30 AMP external plug. Features a fully integrated electric cabinet with air switch and auto shut-off for each appliance—ideal for off-grid or remote locations. Power generator included.
- ✅ Ample Storage & Functional Layout: Features a stainless steel worktable with sliding door shelving, cashier drawer, and service panel. Includes a built-in refrigerator, fresh water tank (29 gal), and waste tank (40 gal) for all-day operation.
New
VEVOR Gas Tankless Water Heater, 5.3Gal Outdoor 120000 BTU Instant Hot Water Heater, Smart Temperature Control & 3/4 inch NPT Interface& Multiple Security Protections for Whole House, Silver Gray
- Enjoy Instant Hot Water: This 5.3Gal, 120,000 BTU/h tankless water heater powered by gas, lets you and your family say goodbye to cold water and enjoy constant, comfortable hot water for showers and more
- ±1℉ Precision Temperature Control: Smart sensors maintain the water temperature within ±1℉ of the set value, avoiding large fluctuations and ensuring a consistent and comfortable water temperature
- Flexible Control: Equipped with a 32.8ft wired control panel, allowing easy adjustment of water temperature, one-touch on/off, temperature control, and unit switching for simple and convenient operation
- Multiple Security Protections: With features like leakage, flameout, dry burning, overheating, timeout, pipe damage, high-temperature lock, wind pressure, and anti-freeze protection, ensures the security of your family
- Easy Installation: Uses a standard 3/4 inch NPT connector; the outdoor unit comes with a vent outlet for easy connection to a direct vent. This instant hot water heater is suitable for various installations, offering a simple and efficient setup
On Sale!New
OEVANT Propane Tankless Water Heater, 6L 1.58GPM Portable Gas Water Heater with Handle & Overheating Protection, Instant Hot Water for RV Camping, Outdoor Shower, Black
- 1.58GPM/6L Portable Propane Water Heater-Experience instant heating with 41,000 BTU/hr output, delivering 1.58 gallons per minute (6L) of hot water.OEVANT tankless water heater provides a temperature rise of 55.4°F–109.4°F (13°C–43°C), perfect for outdoor showers, camping, or RV use without bulky storage tanks.
- Ultimate Off-Grid Companion with Propane Efficiency-Powered by standard 20 lb propane tanks and D-cell battery ignition, OEVANT portable water heater thrives in remote settings. Use it for hunting trips, poolside rinsing, pet washing, or tiny home living—no electrical hookup required. Compact design ensures easy transport and space-saving operation.
- CSA-Certified Tankless Water Heater- Built to US safety standards, our propane water heater includes anti-freeze protection, flame failure detection, overheat shutdown, and low-water-flow cutoffs. Splash-resistant construction withstands light rain, making it reliable for outdoor adventures while prioritizing user safety.
- LED Display for Precision Temperature Control-Adjust settings effortlessly with the bright LED screen, monitoring real-time water temperature to avoid scalding or cold shocks. User-friendly interface simplifies operation for both beginners and seasoned campers.
- All-in-One Portable Kit for Instant Setup-Includes gas regulator, showerhead, hose 5 feet, and mounting hardware. Ready to use in minutes—attach to a propane tank, connect water supply, and enjoy endless hot water wherever life takes you.
$159.99
−$44.00
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New
Powered Anode Rod for Hot Water Heater (40-90 Gallon), 25-Year Warranty, Eliminates Rotten Egg & Sulfur Smell in 24 Hours, Stops Corrosion, Fast Installation, Titanium Built, Universal Fit, 1 Pack
- Instant Odor Removal: Eliminates rotten egg and sulfur smells from your hot water within 24 hours. A smart upgrade to your water heater for clean and fresh water.
- Corrosion, Rust, and Limescale Protection: Extends the life of your tank by preventing rust, corrosion, and buildup. A perfect water heater replacement part for both city and well water systems.
- Maintenance-Free Titanium Build: This titanium powered anode rod outlasts magnesium and aluminum rods. No maintenance or disintegration, even in hard water.
- Quick DIY Installation: Easy anode rod replacement with step-by-step instructions and a 12-foot cord. Fits 40–90 gallon tanks with standard socket removal.
- Universal Fit for Major Brands: Compatible with Rheem, A.O. Smith, Whirlpool, Kenmore, American, and more. Fits electric, gas, solar, and hybrid systems.