How to convert RV water heater to tankless

One of the best ways to improve RVing experience is converting a RV water heater to a tankless model. 

Tankless water heaters heat water on demand. This implies there’ll be no need to worry about running out of hot water.

It’s a relatively straightforward process, and it can be completed in just a few hours.

Not only that, but tankless water heaters are more efficient than traditional models, so families can  save money on their energy bills. 

This guide will show just how to convert RV water heater to tankless. Let’s dive in.

Convert RV Water Heater to Tankless in Simple 8 Steps

1. Shut off the power to the RV at the breaker box

This is the first step to replace the RV water heater with tankless . One must ensure that no power runs through the wires to prevent accidents.RV water heater

2. Drain the RV’s water tank

After shutting off the power, one will need to open the pressure relief valve and then the drain valve to empty the tank.

3. Disconnect the water lines from the old RV water heater

There are two lines, the cold water line and the hot water line. Use a wrench to loosen the fittings and then remove the lines.

4. Uninstall the old RV water heater

There are usually four bolts holding the water heater in place. Remove these bolts and then lift out the old water heater.

5. Install the new tankless RV water heater

Carefully lift the new tankless RV water heater into place and then bolt it down using the same holes as the old water heater.

6. Reconnect the water lines to the new tankless RV water heater

Use the wrench to tighten the fittings on the cold and hot water lines.

7. Turn on the power to the RV

Now, one can go back to the breaker box and turn on the power to the RV.

8. Test the new tankless RV water heater

To test it, simply turn on a faucet inside the RV and let the water run for a few minutes. If everything is working correctly, there should be an endless hot water supply. However, It will help to know how to fill rv hot water heater to ensure that the hot water system works properly after installation.

Benefits of Tankless Water Heater

Here are some reasons one might want to convert RV water heater to tankless:

Get Hot Clean Water on Demand

The best electric tankless water heaters for RV allows users to get clean hot water without waiting for the faucet to warm up. Family members can shower whenever they please, and it’ll always stay nice and hot for washing purposes.

Save Money on Energy Bills

Tankless water heaters are far more efficient than their conventional counterparts. They constantly operate throughout the day, meaning they consume less energy. Also, since they don’t keep water in the reservoir during standby mode, they require fewer trips to the bathroom than conventional units. 

In fact, according to the US Department of Energy, tankless systems can be 8%–14% more energy efficient for homes with daily water usage of 86 gallons or more(1).

No More Dirty Tanks & Filters

Unlike conventional water heaters, which have filters that must be changed periodically, tankless heaters typically don’t require them at all. These systems also don’t have any exposed parts that could leak, so over time, users could save hundreds of dollars on repairs.

A Tankless System Takes Up Less Space

Since a tankless unit requires no storage space, installing one in the home means less clutter and extra square footage that often needs cleaning. This makes them perfect for those who like to live life in a clean, organized fashion.

Safe to Use

Since tankless systems don’t store water, they’re safer to use around children and pets.

Easy to Install

Typically, installation involves connecting wires to run the electricity to the system. After this initial set-up, most people will only need to turn the unit on and then plug it in somewhere convenient. There shouldn’t be anything else involved beyond basic plumbing skills for most residential installations.

Longer Warranty

While warranties typically cover the first few years after purchase, tankless units come with longer warranty periods as long as ten years. That’s why it’s crucial to go through the proper steps and do a professional job when installing these systems.

Low Maintenance

Tankless units are designed to operate continuously. Consequently, they only require weekly maintenance appointments rather than daily ones like traditional models. However, if one plans to travel frequently and want to take the unit, some units feature ports to hook up external hoses. Doing this enables draining the unit without worrying about running into trouble.


What does ECO on an RV water heater stand for?

The ECO Thermostat supplies electricity to the solenoid valve via a closed switch. If the water temperature rises over 180°F, the switch opens, safeguarding the water heater from danger.

What is the primary reason to avoid a tankless water heater?

The major downside of tankless water heaters is that they are more expensive than tank-style heaters. On average, tankless water heaters cost three times as much as tank-style water heaters, including installation.


The advantages of a tankless water heater outweigh its disadvantages. 

With low operating expenses and minimal upkeep requirements, a tankless water heater is an excellent option if one prefers to live more comfortably and enjoy the comforts of indoor plumbing while enjoying the beauty of camping.

Do not hesitate to reach out in the comments for more about tankless water heaters.


Tankless or Demand-type water heaters Retrieved from



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