How to Flush Antifreeze from Camper

As an adventurer who relishes the freedom that comes with owning a camper, regular maintenance is key to keeping your vehicle roadworthy and your journeys smooth.

One such essential task, particularly after the winter season, is flushing out the antifreeze used to winterize your camper’s water system. This not only protects the system but also guarantees that your water is safe for use.

In this article, we will guide you through a detailed and comprehensive step-by-step process to efficiently and effectively flush antifreeze from your camper.

This handy guide will empower you to carry out this crucial task with ease, providing a firm foundation for your future camper maintenance efforts.

Safety Precautions

While we’ve already touched on safety precautions, it’s worth extending this discussion due to the potentially hazardous nature of antifreeze. In addition to wearing appropriate protective clothing and eyewear, it’s important to avoid ingestion or skin contact.

If you have pets, keep them away during the process as antifreeze can be lethal if ingested. Never leave antifreeze unattended in open containers. When disposing of antifreeze, always use a closed, leak-proof container and bring it to an appropriate disposal facility. Never pour antifreeze down a household drain, toilet, or into the ground or a body of water.

Materials Needed

Gather the necessary tools before beginning:

  1. Fresh water
  2. Non-toxic RV antifreeze
  3. Water pressure regulator
  4. Water pump converter kit
  5. Basic hand tools
  6. Protective gloves and goggles

Having these at hand ensures a smooth and efficient process.

Step-by-Step Guide to Flushing Antifreeze from Your Camper

Step 1: Understanding Your Camper’s Water System

An intimate understanding of your camper’s water system is critical. This includes knowing the locations of the water heater, water pump, fresh water tank, and all drain and water valves. The system’s layout may differ based on the camper’s make and model, so always consult your camper’s manual or seek professional help if you’re uncertain.

Your camper’s water system typically consists of the freshwater tank that stores the water, a water pump that provides pressure, a water heater, and a network of pipes leading to different outlets like your sink, shower, and toilet. These components are interconnected, and understanding this connection is crucial for effective maintenance.

Step 2: Draining the Antifreeze

To start with, drain the antifreeze from the system. Locate all low-point drain valves, typically the lowest point in the water system, and open them. This will allow the antifreeze to drain out due to gravity. Open the faucets in the kitchen and bathroom, including the shower and toilet, to facilitate complete drainage.

Make sure to collect the drained antifreeze using a container, as it should not be allowed to flow freely into the environment. Dispose of the collected antifreeze according to your local regulations. Once completely drained, close the valves and faucets.

Step 3: Bypassing the Water Heater

The water heater in your camper needs to be bypassed to prevent the entry of any residue during the flushing process. Most modern campers come equipped with a water heater bypass valve. If yours doesn’t, you might need to install a bypass kit or seek professional help to do so.

The bypass valve is generally located near the water heater and can be easily turned off. This ensures that while you’re flushing the system, the water heater remains isolated.

Step 4: Flushing the System

With all drain valves and faucets closed and the water heater bypassed, attach a hose to the freshwater intake and turn on the water. This will push out the remaining antifreeze from the pipes.

Open all the faucets one by one until the water runs clear. Be patient as this might take a few cycles of filling and draining. Ensure all traces of pink-colored antifreeze are removed and only clear water runs through the system.

Step 5: Sanitizing the Water System

Sanitizing the water system ensures any bacteria, microbes, or residual antifreeze that may be present are eradicated. To do this, fill the freshwater tank halfway with potable water. Then, add a quarter cup of household bleach for every 15 gallons of tank capacity. Once this is done, fill the tank completely.

Run each faucet until you smell bleach. Allow this bleach-water solution to stay in the system for at least four hours. After the waiting period, drain the system and rinse it thoroughly with fresh water until the bleach smell is completely gone. This process guarantees that your water system is not only free from antifreeze but is also safe and ready for use.

Step 6: Checking the System

After the thorough flushing and sanitizing, it’s time to check the water system for any leaks or malfunctions. Inspect all the pipes, valves, and faucets, and pay close attention to the area around the water pump and water heater.

Turn on the water pump and watch the system pressure. If the pump cycles on and off while the faucets are closed, there might be a leak somewhere in the system. Leaks can also be detected by looking for wet spots or by listening for the sound of running water.

If everything checks out and the water tastes normal, your water system is now ready for use.


Flushing antifreeze from your camper is an essential step towards ensuring the longevity of your vehicle and the safety of your water supply. While the task may seem daunting, taking it one step at a time makes it manageable. Regular maintenance is key to enjoying hassle-free trips in your camper.

Remember, this guide is a general approach and your camper might have specific needs. Always consult your camper’s manual or a professional if you’re unsure about anything. With the antifreeze successfully flushed and your camper ready for the road, you can look forward to your next journey with peace of mind.

Disclaimer: Always consult your camper’s manufacturer guidelines when performing any maintenance tasks to avoid causing unintentional damage or voiding your warranty. Seek professional assistance if needed.

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