How To Fill Rv Hot Water Tank

How to Fill RV Hot Water Tank | A Step-by-Step Guide

Are you planning a camping trip in your RV and wondering how to fill the hot water tank? Look no further! In this article, we will provide you with a step-by-step guide on how to fill your RV’s hot water tank, ensuring that you have hot water readily available during your outdoor adventure.

Step 1: Gather the Necessary Tools and Equipment

Before you start filling the hot water tank, make sure you have the following items:

Tools and Equipment
Water hose with a nozzle
Water source (e.g., campground water hookup)
RV-compatible water heater tank cleaner

Step 2: Prepare the Hot Water Tank

Ensure that your RV is properly parked and leveled before beginning the process. Make sure the water heater’s power source (electricity or propane) is turned off to prevent accidents. Locate the hot water tank, typically found outside your RV or in a designated compartment.

Step 3: Flush and Clean the Hot Water Tank

It is recommended to flush and clean the hot water tank before filling it with fresh water. Follow these steps:

  1. Turn off the cold water supply to the RV.
  2. Turn off the water heater’s electrical or propane supply.
  3. Remove the drain plug or open the drain valve to empty the tank. Use a bucket to catch the water.
  4. Once the tank is drained, close the drain valve or replace the drain plug.
  5. Use an RV-compatible water heater tank cleaner according to the manufacturer’s instructions. This will help remove any debris or sediment that may have accumulated in the tank.
  6. Fill the tank partially with water, swish it around, and then drain the tank again. Repeat this process until the water comes out clean.

Step 4: Connect the Water Hose

Now that your hot water tank is clean, it’s time to connect the water hose to fill it up. Follow these steps:

  1. Attach one end of the water hose to a reliable water source, such as a campground water hookup.
  2. Connect the other end of the water hose to the RV’s water inlet, ensuring a secure connection.

Step 5: Turn on the Water Supply

Once the water hose is connected, open the water supply gradually and check for any leaks. If you notice any leaks, tighten the connections or use a leak-proof tape to fix them. Ensure that the pressure is not too high, as it may damage the tank.

Step 6: Fill the Hot Water Tank

With the water supply turned on, open the hot water faucets inside your RV to allow the air to escape from the tank. Leave the faucets open until a steady flow of water is observed without any sputtering or air bubbles.

Next, go outside and check the hot water tank. You will notice water coming out of the pressure relief valve. This is normal and indicates that the tank is being filled properly. Allow the tank to fill until the water overflows from the pressure relief valve.

Step 7: Close the Hot Water Tank Valve

Once the tank is full, close the hot water tank’s pressure relief valve and ensure that there are no leaks around the valve. Also, close the faucets inside the RV.

Step 8: Test the Hot Water System

Turn on the power source to your hot water heater, either electricity or propane, following the manufacturer’s instructions. Allow the water in the tank to heat up for a sufficient amount of time. The time required may vary depending on the system and water capacity.

Once the water is hot, test the hot water system by opening the hot water faucets inside your RV. Ensure that hot water is flowing consistently without any interruptions or fluctuations in temperature.

Frequently Asked Questions For How To Fill Rv Hot Water Tank

How Do You Fill An Rv Hot Water Tank?

To fill an RV hot water tank, locate the water heater, remove the drain plug, and attach a water hose to the tank’s inlet valve. Turn on the water supply and wait for the tank to fill completely.

How Long Does It Take To Fill An Rv Hot Water Tank?

The time it takes to fill an RV hot water tank depends on the tank’s size and the water pressure. On average, it takes about 10 to 15 minutes for a standard-sized tank to fill completely.

What Happens If You Overfill An Rv Hot Water Tank?

Overfilling an RV hot water tank can lead to serious damages such as leaks and ruptures. It is essential to fill the tank to its recommended capacity to avoid any potential issues.

How Often Should You Fill The Rv Hot Water Tank?

The frequency of filling the RV hot water tank depends on your usage. As a general rule, it is recommended to fill the tank whenever it is empty or before each trip to ensure a constant supply of hot water.

Are There Any Safety Precautions When Filling An Rv Hot Water Tank?

Yes, it is important to follow safety precautions when filling an RV hot water tank. Make sure the water heater is turned off and the pressure release valve is closed before filling the tank to avoid any pressure-related accidents.


By following the step-by-step guide outlined in this article, you can easily fill your RV’s hot water tank and ensure a constant supply of hot water during your camping adventures. Remember to properly flush and clean the tank before each refill to enhance its performance and longevity. Happy camping!

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