Winterizing Your TAB 400 (Pre-2021 models)

It’s the time again—time to get your TAB ready for winter. While your owner’s manual provides instructions on how to winterize your TAB 320 and TAB 400, nuCamp has provided the following details on what to do and how to do it.

NOTE: Draining the water system alone will not provide adequate cold weather protection. If the camper is to be unheated during freezing temperatures, consult your dealer for the best winterizing procedure for your climate. Your dealer can supply you with one of the special non-toxic antifreezes that are safe and approved for use in RV water systems.

TAB 400

Step 1: Drain the fresh water tank by opening the water tank drain and leaving open.

Step 2: Turn the water pump ON and open all hot and cold-water faucets. When the flow of the water stops, turn the pump OFF. Open the low point drains on the hot and cold-water pipes.

Step 3: Drain the Alde system by opening the Alde pressure relief valve. (This is the yellow valve that flips up and down and is connected to the blue water pipe.) (See image below)

Step 4: Depress the toilet flush pedal or hand-operated lever. Turn OFF all faucets, close the water line drain valves, fresh water tank drain valve, water heater drain and pressure relief valve.

Step 5: Drain the showerhead and hose by disconnecting the hose at the faucet from the inside and outside shower.

Step 6: Drain the waste water system by following the normal procedure for draining the holding tanks.

Step 7: Be sure ALL water from ALL the plumbing has been drained.

Step 8: Turn your Alde bypass valve to the Bypass mode. (This is in the back-driver’s side of the unit where the 3 drain valves are located. This step is very important).

Step 9: Pour 4 to 5 gallons of RV antifreeze into the fresh water tank.

Step 10: Turn your water pump on and open ALL faucets until antifreeze comes out.

Step 11: Pour RV Antifreeze into your kitchen sink trap (.25 gallons), bathroom sink (.25 gallons) and into your shower drain (.50 gallons). Note: The traps are very susceptible to freezing so this step is very important.

400 Video: https://www.youtube.com/watch?v=dqeXO-SHRcU&list=PLCMrvBGaOplpkvlu_zIsW-YZdR_qelvxo&index=2&t=63s 

320 Video: https://www.youtube.com/watch?v=GiLc0nOQ4as&list=PLCMrvBGaOplpkvlu_zIsW-YZdR_qelvxo&index=2 

Winterizing 2021 TAB 320 and TAB 400

400- See Winterizing Nautilus p3 attachment

320- See 2021 TAB 320 Winterization attachment