4 Gallon Water Heater

The Best 4 Gallon Water Heater

Here are some of the best 4 Gallon Water Heaters on The Trade Table:

Eccotemp i12 Indoor 4.0 GPM Natural Gas Tankless Water Heater with Vertical Vent Kit

The Eccotemp i12 Indoor 4.0 GPM Natural Gas Tankless Water Heater is a compact, energy-efficient solution ideal for small homes, condos, cabins, or light commercial spaces. With a 4.0 GPM flow rate and 80,000 BTU output, it supports 1–2 hot water uses simultaneously and includes a vertical vent kit for easier installation. Featuring digital temperature control, smart sensor technology, and a low energy draw of just 0.5 amps, this wall-mounted unit offers reliable, on-demand hot water without the bulk of a traditional tank system.

Eccotemp FVI12 Indoor 4.0 GPM Natural Gas Tankless Water Heater Vertical Bundle

The Eccotemp FVI12 Indoor 4.0 GPM Natural Gas Tankless Water Heater Vertical Bundle offers an affordable and efficient hot water solution for small homes, apartments, condos, or cabins. With a 74,500 BTU rating and 4.0 GPM flow rate, it easily supports 1–2 applications at once and includes a vertical vent kit for convenient installation. This compact, wall-mounted unit features manual temperature controls, low-flow ignition at just 0.7 GPM, and a digital display powered by a 110/120V connection, making it a smart choice for on-demand hot water without the bulk of a traditional tank.

Marey GA14CSANG Natural Gas Tankless Water Heater 3.7 GPM 100000 BTU Indoor

The Marey GA14CSANG Natural Gas Tankless Water Heater delivers 100,000 BTUs of power and provides up to 3.7 GPM, making it ideal for homes, cabins, apartments, or small businesses with up to three hot water applications. Designed for indoor use, it features a digital temperature display, automatic activation at 0.65 GPM, and no pilot light for added energy savings. CSA certified and DOE compliant, this unit includes H2O Saver technology, runs on 120V power, and comes with a 5-year warranty—though it's not recommended for use above 2,000 feet in elevation.

Frequently Asked Questions About The 4 Gallon Water Heater

Here are some Frequently Asked Questions about the 4 Gallon Water Heater:

What Is A 4 Gallon Water Heater Used For?

A 4 Gallon Water Heater is mainly used to provide hot water at a single point, like under a sink. It's ideal for bathrooms, utility rooms, or break areas where full-size heaters aren't necessary. Because it holds a small amount, it delivers hot water fast without much waiting. It's a great choice when you only need hot water in one spot.

How Long Does It Take A 4 Gallon Water Heater To Heat Water?

Most 4 Gallon Water Heaters heat water in about 20 to 40 minutes depending on the model and power source. Electric versions tend to be quicker than gas-powered ones. Once it’s hot, the unit works to keep the temperature steady. This makes it convenient for quick use throughout the day.

Can A 4 Gallon Water Heater Supply Enough Hot Water For A Shower?

A 4 Gallon Water Heater may not be enough for a full-length shower. It’s best suited for handwashing, light cleaning, or short water use tasks. If you're using low-flow fixtures, you might get a quick rinse. For full showers, a larger tank or on-demand heater is better.

Where Should I Install A 4 Gallon Water Heater?

You can install a 4 Gallon Water Heater under a sink, inside a cabinet, or on a shelf near where you need hot water. It’s designed to be compact, so it fits in tight spots. Common places include bathrooms, kitchens, garages, and RVs. Just make sure there’s an electric outlet nearby if it’s an electric model.

Is A 4 Gallon Water Heater Energy Efficient?

Yes, many 4 Gallon Water Heaters are energy efficient due to their small size and quick heating. They only heat the water you need at one point, which helps reduce energy waste. Some models even come with insulation to hold heat longer. It's a good choice for cutting down on standby energy loss.

How Do I Install A 4 Gallon Water Heater?

Installation usually involves mounting the unit, connecting the water lines, and plugging it into an outlet. Some models can be installed on a wall or floor, depending on your space. Always follow the manual, and if you’re unsure, hire a plumber. It's typically a simple process for point-of-use applications.

Does A 4 Gallon Water Heater Need A Dedicated Circuit?

Some 4 Gallon Water Heaters do need a dedicated circuit, especially if they draw higher amps. It depends on the model and your home’s wiring. Always check the electrical specs in the manual. If you're not sure, it's smart to ask an electrician.

Can I Use A 4 Gallon Water Heater In An RV?

Yes, a 4 Gallon Water Heater is perfect for RV use because of its small size and quick heating. Many RV owners install them for use in kitchenettes or small showers. Just make sure your RV has the right power setup. It’s a convenient way to have hot water on the go.

How Much Power Does A 4 Gallon Water Heater Use?

Most 4 Gallon Water Heaters use between 1,200 and 1,500 watts if electric. That’s similar to a standard hair dryer or space heater. The actual usage depends on how often it’s heating water. Because it’s small, it won’t use as much energy as larger units.

What Are The Dimensions Of A 4 Gallon Water Heater?

Most models are compact, usually around 14 to 18 inches tall and 12 to 14 inches wide. The exact size can vary by brand. They're built to fit easily under sinks or inside cabinets. Always check the specs before buying to be sure it fits your space.

Can A 4 Gallon Water Heater Be Mounted On A Wall?

Yes, many 4 Gallon Water Heaters can be mounted on a wall. Some come with brackets or kits to help with installation. Wall mounting is great for saving floor space. Just make sure the wall can support the weight when the tank is full.

Does A 4 Gallon Water Heater Come With A Temperature Control?

Most 4 Gallon Water Heaters include a thermostat or temperature dial. This lets you adjust the water temperature to suit your needs. It’s usually easy to reach and turn. Some units even include a safety limiter to prevent overheating.

How Heavy Is A 4 Gallon Water Heater?

A 4 Gallon Water Heater typically weighs between 15 to 25 pounds when empty. Once filled with water, it can weigh up to 50 pounds. It’s light enough for one person to move during installation. Always lift carefully or ask for help.

Can I Plug A 4 Gallon Water Heater Into A Standard Outlet?

Yes, most electric 4 Gallon Water Heaters are designed to plug into a regular 120V outlet. This makes them easy to install in most homes or offices. Just make sure the outlet isn't already overloaded. Always follow the manufacturer’s recommendations.

How Do I Drain A 4 Gallon Water Heater?

To drain it, first unplug the unit and turn off the water supply. Open the pressure relief valve and then use the drain valve at the bottom. Let the water flow into a bucket or drain. Always let it cool before starting to avoid burns.

What Is The Lifespan Of A 4 Gallon Water Heater?

A 4 Gallon Water Heater can last 6 to 10 years on average. Lifespan depends on usage, water quality, and maintenance. Keeping it clean and flushing it yearly helps extend its life. Higher-end models with quality components may last even longer.

Do I Need To Flush My 4 Gallon Water Heater Regularly?

Yes, flushing it once a year helps prevent mineral buildup inside the tank. This keeps it working efficiently and extends its life. It’s a quick job that involves draining the water and rinsing out the sediment. Clean water in means better performance overall.

What Type Of Water Connections Does A 4 Gallon Water Heater Use?

Most 4 Gallon Water Heaters use standard 1/2-inch or 3/4-inch NPT fittings. These are common sizes found in home plumbing. Flexible water lines make installation easier. Always double-check the model’s manual to be sure.

Can I Install A 4 Gallon Water Heater Myself?

Yes, if you’re comfortable with basic plumbing and electrical work, you can install it yourself. Just follow the instructions and safety precautions. Many units are plug-in and come with easy-to-use fittings. If you're unsure, it’s best to hire a pro.

Is A 4 Gallon Water Heater Suitable For A Tiny Home?

Absolutely, a 4 Gallon Water Heater is perfect for tiny homes where space is limited. It offers hot water without taking up much room. It’s ideal for small sinks, short showers, or minimal use. It’s a smart fit for energy-conscious living.

What Safety Features Are Included In A 4 Gallon Water Heater?

Most 4 Gallon Water Heaters come with a temperature and pressure relief valve. Some models include automatic shutoff features if overheating is detected. These built-in protections help prevent accidents and extend the unit’s life. Always check the product specs to know what’s included.

How Much Hot Water Can I Expect From A 4 Gallon Water Heater?

You’ll get about 4 gallons of heated water at a time, which is ideal for short uses. It’s enough for handwashing, rinsing dishes, or filling a mop bucket. If used continuously, it will need time to recover. It’s designed for small, quick tasks—not heavy demand.

Does A 4 Gallon Water Heater Maintain Temperature Automatically?

Yes, most models have an internal thermostat that maintains the set temperature. Once the water reaches the target heat level, the unit shuts off until reheating is needed. This keeps the water ready while saving energy. You don’t need to manually reheat it.

Can A 4 Gallon Water Heater Be Used With A Dishwasher?

Yes, it can be used to supply hot water to a small dishwasher, especially in spaces where hot water takes too long to arrive. Just make sure the water heater's output matches the dishwasher's requirements. It can help improve cleaning performance. Always check both appliance specs before setting up.

What Is The Recovery Rate Of A 4 Gallon Water Heater?

Recovery rate depends on the heater’s wattage, but many recover in about 30 to 45 minutes. That means after using all 4 gallons, you’ll wait a short time for hot water again. Electric models tend to recover faster than gas ones. It’s ideal for low-demand settings.

Will A 4 Gallon Water Heater Run Out Of Hot Water Quickly?

Yes, if used for tasks like long showers or continuous washing, it can run out fast. It’s built for quick jobs like handwashing or rinsing. Once emptied, it needs time to heat up again. A larger tank may be better if you need constant hot water.

How Do I Know If My 4 Gallon Water Heater Is Working Properly?

Check if the water is heating to the correct temperature and staying hot. Listen for any unusual sounds or leaks around the unit. Most models have an indicator light that shows if the unit is powered. If things seem off, consult the manual or a technician.

Is There A Warranty On A 4 Gallon Water Heater?

Yes, most brands offer warranties ranging from 1 to 6 years. The warranty usually covers the tank and sometimes the heating element. Keep your receipt and register the product if needed. Always read the warranty terms for what's included.

What Maintenance Does A 4 Gallon Water Heater Need?

Basic maintenance includes flushing it once a year to remove sediment. Check the pressure relief valve and power cord regularly. Wipe down the exterior and make sure fittings stay tight. Simple upkeep goes a long way in extending its life.

Can I Replace My Current Unit With A 4 Gallon Water Heater Easily?

Yes, swapping a similar-sized or point-of-use unit with a 4 Gallon Water Heater is usually straightforward. Just confirm your water and electrical connections are compatible. Many people upgrade older models this way. If you're unsure, a professional can help install it safely.

Where To Buy A 4 Gallon Water Heater?

You can buy a 4 Gallon Water Heater at The Trade Table.