This article applies to any TAB 320 model equipped with the Nautilus P3.

Guide to Winterizing a TAB 320 

Step 1: Prepare the System for Draining

1. Set the Nautilus panel to Power Fill using the key on the sticker.
2. Open the hot and cold low-point drain valves to let any liquid drain out.
3. Drain the gray tank to remove excess water.
4. Locate the fresh water tank drain on the passenger side of the wheel well and drain it.
5. 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

1. Once everything is drained, close the:

• 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 (garden hose to air hose)
• Short leader hose

Steps: 

1. Set each Nautilus panel knob to a 45-degree angle.
2. Connect your garden hose to the air compressor.
3. Set the air pressure to 40 PSI.
4. Open one low-point drain valve and allow compressed air to push out excess water.
5. Close the drain valve and repeat with the other low-point drain valve.
6. Inside the camper, blow out the water heater drain using the same process.
7. Once finished, disconnect the garden hose from the air compressor.

Step 4: Add Antifreeze

1. Set the Nautilus panel to Winterize mode.
2. Insert the leader hose into the antifreeze jug or bucket.
3. Turn on the water pump to start the siphoning process (it will stop when the lines are pressurized).
4. Open each faucet and fixture inside the camper (hot and cold) until the water runs pink.
5. Open the bathroom faucet and run both hot and cold until pink.
6. Connect the external shower hose and turn on the hot and cold taps until pink.
7. Pour antifreeze down the shower drain to protect the trap.
8. Add antifreeze to the toilet to protect the shutter valve.

Your camper is now winterized! If you have any questions, contact tech@nucamprv.com.

1. Drain the Antifreeze

• Open the gray tank to drain out its contents, then close it.
• Open the hot and cold drain valves to drain any remaining antifreeze.

2. Prepare a Sanitizing Solution

• Mix your sanitizing solution based on your preference.
• A stronger solution can be immediately rushed, while a weaker solution will need to sit to sanitize effectively.
• Recommended: 1/4 cup per 15 gallons. Let rest for 12 hours.
• The video suggests 1/2 cup of bleach per gallon of water in a bucket. This can be immediately flushed.
• Connect one end of a hose to the city water inlet and place the opposite end into the sanitizing solution.
• A shorter hose is more efficient for this step.

3. Siphon the Sanitizing Solution

• Turn the Nautilus panel knobs to the Sanitize position using the key on the sticker.
• Turn on the water pump to begin siphoning the sanitizing solution.
• Once the freshwater tank is full, turn off the water pump.
• Use the key on the sticker to switch to Dry Camp mode.

4. Flush the Antifreeze from Faucets and Fixtures

• Inside the camper, turn on the water pump.
• Run water through all faucets until the pink antifreeze is gone.
• Connect and run the external shower hose to remove any antifreeze residue.

5. Empty the Fresh Water Tank

• Open the freshwater drain valve and let the contents drain completely.
• Close the valve when done.

6. Refill the Freshwater Tank

• Set the Nautilus panel to Power Fill mode.
• Connect a garden hose to the city water connection.
• Use an inline water pressure regulator to prevent over-pressurization.
• Monitor the water level to avoid overfilling.
• Once full, switch the Nautilus panel to Dry Camping mode.

7. Flush the System with Fresh Water

• Run fresh water through all faucets and fixtures to remove any remaining sanitizing solution.
• Turn off the water pump once finished.

Final Step: Ready for the Camping Season

Your nuCamp TAB 320 is now dewinterized and ready for use! If you have any questions, contact tech@nuCamprv.com.