1 Gallon Water Heater

The Best 1 Gallon Water Heater

Here are some of the best 1 Gallon Water Heaters on The Trade Table

Marey ECO150 14.5kW Electric Tankless Water Heater

The Marey ECO150 14.5kW Electric Tankless Water Heater offers efficient, on-demand hot water for up to two usage points, like dual showers in warmer regions. Its compact design features a corrosion-resistant heating element, stainless steel chamber, and instant heating with as little as 0.5 GPM flow. With energy savings, a 5-year warranty, and easy wall-mounting, it's a smart solution for homes needing reliable hot water without the bulk of a traditional tank.

Eccotemp Luxé 1.5 GPM Portable Outdoor Tankless Water Heater with EccoFlo Diaphragm 12V Pump and Strainer

The Eccotemp Luxé 1.5 GPM Portable Outdoor Tankless Water Heater is a lightweight, battery-powered water heater perfect for camping, cabins, or off-grid use. It delivers up to 1.5 gallons per minute with temperature control between 50–120°F and includes a 12V EccoFlo diaphragm pump and strainer for reliable water flow. Designed for easy portability and propane operation, it features a digital display, safety shutoff, and durable weather-resistant finish for dependable outdoor performance.

Frequently Asked Questions About The 1 Gallon Water Heater

Here are some Frequently Asked Questions about the 1 Gallon Water Heater:

What Is A 1 Gallon Water Heater Used For?

A 1 Gallon Water Heater is used for small, quick tasks like washing hands or rinsing dishes. It provides hot water to one specific spot, usually a sink. It’s perfect when you don’t need a full-size water heater.

Who Should Consider Installing A 1 Gallon Water Heater?

Anyone needing hot water in a small area like a bathroom, office break room, or wet bar should consider it. It’s also helpful if you’re tired of waiting for hot water from a distant main heater. This is a great option for energy savings in low-demand areas.

How Much Space Does A 1 Gallon Water Heater Require?

Most 1 Gallon Water Heaters are compact and fit easily under sinks or inside cabinets. They don’t take up much room, which makes them great for tight spaces. Just make sure you check the product dimensions before buying.

Is The 1 Gallon Water Heater Suitable For Residential Use?

Yes, it’s commonly used in homes where only a small amount of hot water is needed. It works great in guest bathrooms, garages, or remote sinks. It’s also popular in tiny homes and apartments.

What Are The Main Benefits Of A 1 Gallon Water Heater?

It heats water fast, saves energy, and takes up very little space. You get hot water right where you need it without wasting time or water. It’s also easy to install and usually low-maintenance.

Where Should I Install A 1 Gallon Water Heater?

You can install it under a sink, inside a cabinet, or anywhere close to where you need hot water. It’s designed for point-of-use applications. Just be sure there's access to plumbing and electricity.

Can I Install A 1 Gallon Water Heater Under A Kitchen Sink?

Yes, this is one of the most common places to put it. It’s small enough to fit and works well for hand washing or dish rinsing. Just check for clearance and nearby connections before installing.

Does A 1 Gallon Water Heater Need To Be Mounted?

It depends on the model, but many can be mounted on a wall or floor. Wall-mounting saves even more space. Always follow the instructions provided with your unit.

Do I Need A Professional To Install A 1 Gallon Water Heater?

Not always—if you’re comfortable with basic plumbing and electrical work, you might do it yourself. However, a professional can ensure it's safely connected and up to code. When in doubt, it’s smart to call an expert.

What Electrical Requirements Are Needed For A 1 Gallon Water Heater?

Most models plug into a standard 120V outlet. Some may need hardwiring depending on the brand and setup. Always check the specifications before installation.

How Fast Does A 1 Gallon Water Heater Heat Water?

It usually heats water in 10 to 15 minutes, depending on the starting temperature. Since it only holds one gallon, it doesn't take long to reach the set temperature. You’ll get hot water quickly for light tasks.

How Hot Does A 1 Gallon Water Heater Get?

Most units can heat water up to 140°F or so, depending on the thermostat setting. You can usually adjust the temperature to suit your needs. Just be careful not to set it too high to avoid burns.

Is A 1 Gallon Water Heater Energy Efficient?

Yes, it uses less energy because it only heats a small amount of water. There’s less heat loss compared to larger tanks. It’s a smart choice for reducing your utility bill in low-use areas.

Can I Use A 1 Gallon Water Heater For A Shower?

It’s not ideal for showers since it only holds enough hot water for about 20 to 30 seconds. It’s better suited for sinks and quick jobs. You’d need a larger tank for comfortable showering.

How Long Does The Hot Water Last From A 1 Gallon Water Heater?

It usually provides hot water for under a minute, depending on your flow rate. That’s enough for washing hands or rinsing something. Once it runs out, it takes a few minutes to reheat.

How Often Should I Flush A 1 Gallon Water Heater?

You should flush it once or twice a year to remove sediment buildup. This helps keep it working efficiently. It’s a simple maintenance step that extends the life of the unit.

What Maintenance Does A 1 Gallon Water Heater Need?

It needs occasional flushing, temperature checks, and inspection of the heating element. Also, make sure there are no leaks or corrosion. Regular care keeps it running smoothly.

Does A 1 Gallon Water Heater Need An Expansion Tank?

In most cases, no expansion tank is needed for such a small unit. But if your plumbing system has a backflow preventer, one might be required. Check local codes or ask a plumber.

Can I Replace The Heating Element In A 1 Gallon Water Heater?

Yes, if the unit is designed for it, you can replace the heating element. It’s usually a simple fix with the right tools. Just turn off the power and water before starting.

How Do I Clean The Inside Of A 1 Gallon Water Heater?

You can flush it out with clean water and use vinegar if there's scale buildup. Be sure to turn off power and drain the tank first. Regular cleaning helps it last longer.

Can A 1 Gallon Water Heater Connect To Cold Water Lines Only?

Yes, it connects directly to the cold water supply and heats it internally. You don’t need a separate hot water line. That makes installation simpler in many cases.

Does A 1 Gallon Water Heater Work With Low Water Pressure?

Yes, most models work fine with lower pressure, but check the specs to be sure. Extremely low pressure might affect performance. If your sink works normally, the heater likely will too.

Is A 1 Gallon Water Heater Compatible With All Sink Fixtures?

It works with most standard sink fixtures. Just make sure the flow rate isn’t too high or it will empty fast. Slower flow gives you more usable hot water.

Can I Use A 1 Gallon Water Heater In An RV Or Camper?

Yes, it’s a great fit for RVs, campers, or tiny homes. Just make sure your electrical system can handle it. Its small size and quick heating make it ideal for travel setups.

What Type Of Pipe Connections Are Used For A 1 Gallon Water Heater?

Most use standard 1/2-inch or 3/8-inch connections. Compression fittings or flex hoses are often used for easy setup. Always follow the connection guidelines in the manual.

What Safety Features Come With A 1 Gallon Water Heater?

Common features include a temperature control knob, thermal cut-off switch, and pressure relief valve. These protect the unit and prevent overheating. Safety is built into most modern designs.

How Much Electricity Does A 1 Gallon Water Heater Use?

It typically uses between 1200 and 1500 watts. Because it heats a small amount, the energy use is fairly low. It only runs when needed, so it's efficient for spot use.

Is A 1 Gallon Water Heater Safe For Continuous Use?

Yes, as long as it’s installed correctly and used within its limits. It cycles on and off to maintain temperature. Like any appliance, follow safety instructions and check it regularly.

What Should I Consider Before Buying A 1 Gallon Water Heater?

Think about how much hot water you need and where it’ll be used. Also, check for space, electrical access, and local codes. It’s best for low-demand situations.

Are 1 Gallon Water Heater Units Available In Tankless Versions?

Tankless units that offer low-volume hot water do exist, but they’re not exactly 1 gallon in size. They heat water on demand without storing it. If you want nonstop flow, a tankless model might be a better fit.

Where To Buy A 1 Gallon Water Heater?

You can buy a 1 Gallon Water Heater at The Trade Table.