How to Winterize an RV Using Pressurized Air

Duration: 2:24

There are a few different ways you can winterize an RV, including the use of antifreeze or compressed air to free the lines of any water that might freeze when temperatures drop. No matter what method you use, you need to fully understand how to winterize an RV to avoid any damage while in storage.

If you are not planning on using your RV during the winter months it is best to blowout the water inside the system using compressed air. To do so, you will need an adapter that screws into the city water fill line and a typical air compressor used in a garage.

Knowing how to winterize an RV using compressed air will ensure you complete the process properly. Set the air compressor at 120 PSI. Put it in place against the adapter attached to the water line and open each of the faucets inside the RV. When using compressed air it might be best to enlist the help of someone who knows how to winterize an RV because he or she may have to be on the inside of the RV watching while you are squeezing the compressor’s trigger.

Turn on the faucet for both the hot and cold water lines to ensure they are completely empty of any water. Some sinks and drains may have water left behind. If so, pour a cup of antifreeze down each drain.

Another thing you will be told when learning how to winterize an RV using compressed air is to remove the water filter. This will prevent it from freezing while in storage.

Once you have learned how to winterize an RV you will discover that this method is the best when the RV will not be in use during the winter. This way you do not have to worry about learning how to winterize an RV using antifreeze and having to drain it when spring comes along.

Discussion
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10 Responses to “How to Winterize an RV Using Pressurized Air”
  1. Michael Carey
    Michael Carey

    You don’t really want to hook up the air compressor with it set to 120 psi, do you? Isn’t that too much pressure for most RV plumbing? I set mine for about 30 psi.

    Reply
    • Customer Service
      Customer Service

      Hey there Rocky!

      That’s a great question!

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  2. Don
    Don

    Isn’t setting the air compressor to 120 psi a b it extreme? That much pressure is sure to blow out a connector or hose.

    Reply
    • Customer Service
      Customer Service

      Hello Don!

      That’s a great question!

      The ‘Ask an Expert’ section is currently for members to our online community. We do have a promotional offer if you are interested. This would include access to expert advice (like this), plus discounts, hours of Premium videos, etc. Please feel free to take a look. You can message us right back with your question if you decide to become a member and you will have a response within 1-2 business days from our experts!

      Please follow the steps below to receive the annual membership at the introductory rate:

      1. Click on the email link: https://go.rvrepairclub.com/c19138
      2. Click on the Premium Membership offer.
      3. The Checkout page will display your Premium Membership purchase.
      4. Fill in your Billing Details and create an account password.
      5. Fill in your debit/credit card information.
      6. Finish by clicking Complete Order.

      If you have any further questions, please contact Customer Service at 1-855-706-3536 at your earliest convenience, or chat with us on our site.

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      Jessica
      RV Repair Club Video Membership

      Reply
  3. Jim Starling
    Jim Starling

    You did not say anything about hot water heater drain plug removal bypass valves

    Reply
    • Customer Service
      Customer Service

      Jim,

      Yes, sorry we should have mentioned that. You will need to bypass the tank and pull the drain plug before blowing the lines out. You also have to add anti-freeze down the drains in case he didn’t mention that either. This is to ensure the traps don’t freeze and crack.

      Sincerely,

      Dan
      RV Repair Club Technical Expert

      Reply
  4. STEVEN
    STEVEN

    I was surprised that a pressure of 100-125 psi appeared to be suggested for pressurizing the water lines. My house pressure is 65 psi and our city water system operates on 70-90 psi. Most of the RV water pressure regulators I’ve seen operate at not more than 60 psi so I would never go to the pressure suggested. My father-in-law made an air hose adapter by drilling a hole to accept a standard air chuck fitting in a PVC screw on cap that fits the city water inlet fitting on my trailer. Just chuck the air hose onto that fitting, set the pressure at 40 psi and blow away.

    Reply
  5. Vernon Long
    Vernon Long

    I use my water hose along with the adapter, then can take water hose and the air hose into the RV, so I can do each water faucet inside the RV. Makes it a one person job. Easy peasy.

    Reply