Proper winterization protects your RV’s plumbing system from freezing temperatures and helps ensure everything is ready to go when camping season returns. Follow these steps to safely winterize your camper.


1. Drain the Plumbing System

This includes:

  • Hot water lines
  • Cold water lines
  • Freshwater tank
  • Gray tank
  • Black tank

Allow everything to drain completely. Once the system is empty, close all drains and valves.


2. Drain the Hot Water Tank


Inside the camper, locate the Alde relief valves under the dinette bench. Open the valves, let it drain completely, and then close it back up.


3. Blow Out the Water Lines (Recommended)


For extra protection, it’s a good idea to blow out the water lines to remove any remaining water trapped in the system.

  1. Connect an air compressor to the city water inlet.
  2. Set the compressor to no more than 40 PSI.
  3. Open one faucet or line at a time.
  4. Allow air to push through the system until no more water sprays out.

While this step isn’t as critical as draining and adding antifreeze, it helps prevent any leftover water from freezing and damaging your pipes.


4. Add RV Antifreeze

  1. Connect a short hose to the Nautilus system.
  2. Set the Nautilus panel to Winterize Mode.
  3. Ensure all faucets, fixtures, and drain valves are closed so the pump can create suction.
  4. Place the other end of the hose into a jug of RV antifreeze.
  5. Turn on the water pump to begin drawing antifreeze into the system.


5. Run Antifreeze Through All Fixtures


Start with the kitchen faucet. Run both the hot and cold sides until pink antifreeze appears.

Repeat this process with:

  • Bathroom sink
  • Shower
  • Exterior shower

This ensures antifreeze fully protects every water line.


6. Protect the Drains and Toilet


Finish the process by protecting the remaining plumbing components. Pour antifreeze down the shower drain, and flush the toilet to bring antifreeze into the bowl. 


Your Camper Is Ready for Winter


Once these steps are complete, your camper is fully winterized and ready for storage until your next adventure.