How to Blow Out Water Lines in RV?

How to Blow Out Water Lines in RV

If you are looking for instructions on how to blow out water lines in your RV, you will have to use a high-pressure air compressor. These can be purchased from any hardware store, or you can purchase a motorized air compressor. Before you begin, you will need to understand what PSI means and how to use it. You can use a motorized air compressor or a car tire compressor.

PSI is a unit of pressure

Before using an air compressor to blow out water lines in your RV, you should know how to measure PSI (pounds per square inch). The PSI of the air compressor is usually between 70 and 90 mostly. It is a good idea to stick to this pressure, as anything over that might damage the water lines. If you don’t know what PSI means, look up the definition of PSI and the proper air pressure for your RV.

How to blow out water lines in RV? Most effective methods

There are two ways to blow out water lines in your RV. The first method is to use a portable air compressor, which is a simple tool you can find at a local RV repair store or online. You can also take your RV to an RV repair shop. Either way, the most effective method is to use an air compressor to blow out the water lines in your RV.

Using compressed air to blow out water lines in your RV is an excellent method of winterizing your RV. It is environmentally friendly and requires less antifreeze than a car compressor. However, be aware of the disadvantages of using automotive antifreeze since it is poisonous and not meant for potable water systems. Use 35-50 PSI air pressure to flush out the black tank.

Things to keep in mind:

A car tire compressor can be used to blow out water lines in an RV. The air pressure inside the lines is maintained between 30 and 40 PSI. Some air compressors are designed for use with heavy-duty tires, so you should make sure to buy one that matches your needs. The compressors are also designed for a certain PSI range, so be sure to check the manual to see how many PSI they can handle.

However, using a car tire compressor to blow out water pipes in an RV does not completely eliminate the risk of freezing. You should still make sure to add a little pink antifreeze to the lines to prevent any water from freezing. It is important to remember that high pressure is not as effective as high volume. The compressor needs to be at 30-40 psi for a long time to push water out of the lines.

Before using an air compressor to blow out water lines in an RV, you should ensure that the unit is completely disconnected from the water heater. It is also recommended that you switch off the RV water heater 24 hours before starting the blowout process. If you do not disconnect the water heater, you risk the possibility of burns and damage to the components of the RV. If you are unsure, call a local RV repair shop to learn how to blow out water lines in an RV.

Advantages of Blowing Out Water Lines in RV

When you’re in an RV, blowing out water lines is an important step to take. Blowing out water lines prevents water from freezing in the pipes. This problem is common with water traveling through the rig. By blowing out the water lines, you can prevent this water from sitting in the lines, causing them to crack and freeze. Using a strong air compressor is a great way to blow out water lines.

In colder climates, RV owners should blow out the water lines before storing their RV. This is because frozen water expands, causing cracks and breaks. When you open the RV in the summer, you might find extensive water line repairs that have been ignored. So, blowing out water lines before storing your RV is a wise decision. This way, you can get the most benefit from it.

Another advantage of blowing out water lines in RV is that it’s less expensive than using antifreeze. Besides, you don’t have to deal with antifreeze disposal and a whole system flush. Additionally, the process is faster and easier than using antifreeze. It’s especially useful for RV owners who store their vehicles in cold climates for extended periods. In addition, it doesn’t harm your fresh water supply.


It is advisable to blow out the water lines in your RV before storing them in cold climates. Frozen water in the pipes expands, causing cracks and breaks in them. You don’t want to come back to an RV with extensive water line repair. Besides, it will save you a lot of money and the environment. So, what are you waiting for? Follow the steps above and blow out water lines easily!

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