This process applies to all TAB 400s equipped with the Nautilis P3.


Freezing climates can damage the camper’s plumbing system and equipment. The camper must be drained, blown out, and have antifreeze protection before storing in below-freezing temperatures in fall/ winter. This is done through a process called winterizing.

 

Be sure to always use a non-ethanol-based antifreeze when winterizing your camper.

 

When getting the camper ready for camping season in spring you must cleanse the potable freshwater system to remove all the antifreeze. This process is called de-winterizing or sanitizing.

 

User instructions for winterizing, de-winterizing, flushing, and sanitizing can be found on the Nautilus plumbing control panel manufacturer’s website at: http://www.bandbmolders.com/index.php/p3-2/


Below is a video showing you step-by-step how to winterize a TAB 400. This video can be used for any TAB 400 equipped with the Nautilus P3 (2021-2023). Drain locations may vary depending on the model year.

 

1. Prepare the System

  • Set the Nautilus panel to Power Fill mode using the key on the sticker.

2. Drain the Water System

  • Open the freshwater tank drain valve.
  • Open the hot and cold low-point drain valves to drain the remaining liquid.
  • Empty the black tank at a dump station using a sewer hose.
  • Open the gray tank to drain excess water, then close it back up.

3. Drain the Water Heater

  • Locate the water heater drain under the bed.
  • Remove the panel under the bed for access.
  • Lift the lever on the drain valve and drain completely.
  • Once drained, close the valve and replace the bed panel.
  • Close the fresh water tank drain and low-point drain valves for hot and cold lines.

4. Blow Out the Plumbing Lines

Materials Needed:

  • Air compressor (set to 40 PSI)
  • City water inlet adapter
  • RV blowout adapter

Steps:

  1. Set all Nautilus panel knobs to a 45-degree angle.
  2. Remove the screen from the city water inlet.
  3. Attach the air compressor to the Nautilus panel.
  4. Open each plumbing line one by one and blow out the line at 40 PSI.
  5. Repeat for hot and cold low-point drains, fresh water tank, and gray tank.
  6. Open the water heater drain and blow out that line as well.
  7. Once complete, replace the city water inlet screen.
  8. Turn the Nautilus panel to Winterize mode using the key on the sticker.

5. Add Antifreeze to the System

  1. Attach a garden hose to the city water inlet.
  2. Place the other end of the hose in a jug or bucket of antifreeze.
  3. Turn on the water pump to begin the siphoning process.
  4. Once the lines are pressurized, move inside the camper.
  5. Open each faucet and fixture (kitchen, bathroom) until the water runs pink.
  6. Run both hot and cold water through each fixture.
  7. Turn on the shower and let the antifreeze run through.
  8. Pour antifreeze down the shower drain to protect the trap.
  9. Add antifreeze to the toilet to protect the shutter valve.

6. Winterize the External Shower

  • Connect the external shower hose.
  • Run antifreeze through both hot and cold taps.

Final Step: Ready for Winter Storage

Your nuCamp TAB 400 is now properly winterized! If you have any questions, email tech@nucamprv.com.


Stay warm and safe!