This article applies to TAB 320 models with the Nautilus P2.5, which includes 2021 and 2022.


Step 1: Prepare the System for Draining

  • Set the Nautilus panel to Tank Fill using the key on the sticker.
  • Open the hot and cold low-point drain valves to let any liquid drain out.
  • Drain the gray tank to remove excess water.
  • Locate the freshwater tank drain on the passenger side behind the wheel well and drain it.
  • Inside the camper, lift the dinette seat to find the water heater drain, then open it and let it drain completely.

Step 2: Close the Drains

Once everything is drained, close the following:

  • Water heater drain
  • Freshwater tank drain
  • Gray tank drain
  • Low-point drain valves (hot and cold lines)

Step 3: Blow Out the Lines

Materials Needed:

  • Air compressor
  • Pressure gauge
  • RV blowout adapter (for city water inlet)

Steps:

  • Set each Nautilus panel knob to a 45-degree angle.
  • Remove the screen from the city water inlet.
  • Attach an air compressor to the Nautilus panel.
  • Blow out each line one by one using 40 PSI, then close it back up.
  • Repeat this process for:
    • Hot and cold low-point drains
    • Freshwater tank
    • Gray tank
  • Replace the screen once you're done blowing out all the lines.

Step 4: Add Antifreeze

  • Turn the Nautilus panel knobs to Winterize position using the key on the sticker.
  • Turn the red bypass valve to the bypass position (should be vertical).
  • Connect a garden hose to the Winterize port.
  • Place the other end of the hose into a jug or bucket of antifreeze.
  • Turn on the water pump to begin siphoning antifreeze into the system (pump will stop once the lines are pressurized).
  • Open all faucets and fixtures inside the camper (hot and cold) until the water runs pink.
  • Outside the camper, run antifreeze through the external shower by turning on both the hot and cold taps.
  • Pour antifreeze down the shower drain to protect the trap.
  • Add antifreeze to the toilet to protect the shutter valve.

Your camper is now winterized!

If you have any questions, contact tech@nucamprv.com.