How To Convert an RV Water Heater To Tankless- Step by Step Guide 2022

Nowadays, people love to enjoy outdoor places and enjoy all luxuries of life while using an RV or on tourism. In winters, most people keep water heaters that meet their needs.

But nowadays everyone wants to use the latest products and devices. Using an RV tankless water heater is more beneficial than using traditional and heavy style heaters that are expensive too. So, if you want to transfer your traditional heater to an RV heater, it’s very easy now.

Down in this post, here are some ways how to convert RV water heaters to tankless water heaters easily. Hence, you can save money that you would spend on an RV tankless water heater.

Why Convert an RV Hot Water Heater to Tankless?

 convert RV water heater to tankless water heater

The reason is that nowadays tankless water heaters are demanding and are easy to use. Due to their couple of advantages, now people prefer to use these new style heaters. Professionals themselves recommend using an RV water heater because of the overall importance.

Converting RV water heater to electric is now very easy due to many options available in the market. Furthermore, we provided some proven ways to assist you in daily life. So, if you own RV water heater installation and want to turn it into a tankless water heater, here are the steps and complete guide. 

Don’t stop reading this article to know converting RV water heater to electric!

Replacing the RV Water Heater With Tankless- Easy Steps

To replace the RV water heater with tankless, here are some easy steps. Follow these steps as they are and see the amazing results!

Step#1: Disconnect all the Parts and Appliances

The first step is to convert the RV water heater to tankless is disconnecting all the parts and appliances if these are attached. Switch off the heater and water connection from all taps and appliances. In this way, you can avoid any resistance or trouble that may happen in the next steps.

Step#2: Draining the Tank

Now drain the tank and carefully remove the water in it. Make sure that there is no worry about the fast water flow from the tank. Furthermore, please find out the draining valve and then open it to remove all the water carefully.

Step#3: Remove the Old Unit

The next step is to untight the old unit or heater you are already using. You can use a screwdriver or any other common device used to untight the screws.

In the next process, just cut down the unit’s seal by using a seal scrape and make sure that no parts of the units are attached; if they are still attached, you can use any other device to make them separate. 

Don’t worry about the time as it will take just a few minutes to do this job and from now on you can move towards the next steps easily. Remove the old unit very carefully such that nothing is affected on the unit. 

Step#4: Clean the Area

Now clean the whole area where you perform the work done until now. Wash away all the debris and other particles from the unit and RV. Clean the whole residue or wash with clean water. 

Now the opening where you want to replace the tankless water heater must be the same size as your new heater. 

Measure exact dimensions and by the new unit of the same size. And you can easily measure these dimensions by using a measuring tape or anything else for an estimation like a long strip or piece of thread.

Step#5: Mount New Heater

After implementing all the previous steps, the next step is to mount the new heater at the exact place. Carefully fill all the gaps and if they are still there, then seal them off by using a tap or any other thing. Caulk around the gap for better installation. After that, there are two wires, including the red one and the black one. The red one should be attached to the parking area, and the black one should be attached to the ground area. 

The next and most important step is to attach hot and cold water lines to the tankless system. Also, check if the control panel is successfully installed and shows all the parts the same way as a conventional storage panel. 

After mounting the heater, check whether all the points are correctly attached or not. If you find anything wrongly placed, again recite and fit that thing in a better way. 

Step#6: Post Installation Steps

After installing and converting a simple heater into an RV tankless water heater, the end step is to check if it’s working fine. Turn on the water pathway and all the switches.

Also, check the outlets are attached correctly or not. Adjust the temperature using the control panel and check it once before usage. Also, check hot water quality and its flow rate running out of the tap or any other appliance you are using. 

Hence, it becomes very easy to convert the water heater to tankless for RV using these steps.

RV Tankless Water Heater Maintenance Tips

Although RV water heater installation is easy to maintain, here are some tips that should be considered so that there is no trouble while doing the overall procedure. Also, it would help if you avoid any fear or suspect conduct. So, read these tips and guide!

  • After converting the water heater to tankless now, you must see what is the best extent for the water heater and then adjust that temperature for permanent.
  • Don’t worry about mounting the tankless water heater on the RV because it can easily be mounted in any space available. This is because most people end up for bad installation of RV Tankless heaters for waiting for specific space.
  • Make sure that the heater is properly mounted and fixed at its place; otherwise, it may cause dangerous issues. Specifically, RV electric tankless water heater needs proper attention and time to install 

Note: You can also use an RV water heater electric conversion kit, which is now ready-made available at any marketplace. 

Converting RV Heater into Tankless Water Heater Video Guide

Watch the complete video given below and learn more about RV tankless water heater guide!

Benefits of Converting RV water Heater to Tankless Water Heater 

Save Space

A traditional RV water heater requires a lot of space because of its design. Hence, you may need a specific place to keep it everywhere. But you must be surprised to know that a tankless water heater uses less space. Furthermore, you can mount it anyplace inside your RV.

No More Leakage

A tank water heater’s major issue is the leakage problem which happens several times, specifically when you are continuously using it. But tankless water heater is free of such leakage issues. The reason is that here you get instant hot water depending upon your need. Water does not remain in the tank for long hours. And hence there are no issues like leakage.

Instant Hot Water Supply

The most important and common reason tankless hot water for RV is the instant hot water supply anytime when you need it. Hence, you don’t need to wait for minutes to get your water warm enough for usage. But it offers instant hot water free of harmful chemicals and any other issues. 

Now using RV tankless water heater, you are free of a cold shower for permanent. Don’t wait and turn your tank water heater into a tankless water heater in RV.

Energy Efficient

Another reason for using an electric RV tankless water heater or gas RV tankless water heater is saving a lot of energy and indirectly saving your money. All tank heaters demand a lot of gas or electricity. But an electric tankless system uses very little gas or energy. 


An RV tankless heater works ( specifically Girard tankless water heater) for a long time without any issue. Probably it works for 8-10 years with a warranty. So, using an RV tankless water heater is one of the versatile and best choices, specifically when you are on a long trip outside of the home. 

Note: 110 Volts Tankless water heater is the best choice to install in an RV. 

Disadvantages of Converting RV Water Heater into Tankless Water Heater

  • Small in size, and you need to turn it ON when you want to use
  • Sometimes it may cause inconsistent hot water due to bad water flow
  • For installation, you need to spend huge money

Frequently Asked Questions

Can you put a tankless water heater in a camper?

Yes, you can use an RV tankless water heater in Camper but firstly, make sure that your Camper is long enough to absorb the heater’s size easily.

What is the best tankless water heater for RV?

Professionals best recommend a 110-volt tankless water heater for RV for this purpose. 

Can you put a tankless water heater in an RV?

Yes, using all the above steps, it’s easy and wise to put a tankless water heater in an RV. 

Wrapping Up Converting RV Heater into Tankless Heater

Hence, after the above steps and guide, we hope you know how to convert RV water heater to tankless easily. Make sure to follow all the above steps and tips to use for a long time. The most positive point is that you can use it for a permanent lifetime. 

The need for RV tankless water heaters is increasing daily as most people are involved in outside activities for work or any personal purpose. It is the best choice for those who love to visit outside places and do tours for a long time. 

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Bella Rose
By Bella Rose

Hello Everyone! I'm Bella Rose. I believe in spending wisely when it comes to knowing about home and kitchen appliances. Spend smartly and make your home smart.

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