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cleanse the potable fresh water system to remove all the antifreeze. This
process is called de-winterizing or sanitizing.
User instructions for winterizing, de-winterizing and sanitizing can be found
on the Nautilus plumbing control panel manufacturer’s website at:
http://
www.bandbmolders.com/index.php/p3-2/
While the Nautilus system instructions are generalized instructions, the
following steps outline more detailed instructions for winterizing the fresh
water & waste water plumbing systems in your camper:
1. Empty all black and gray tanks into an appropriate disposal.
They must be as completely empty as possible.
2. Level your camper or tilt it in such a way that the water in the
tanks flows toward the low point and tank drain openings.
3. Turn the handles on the Nautilus Panel to Power Fill Mode.
4. Open all drains in the unit:
a. Fresh water tank drain
b. Low point drains (Red and blue Alde drain valves)
c. Hot water tank drain (Yellow Alde drain valve. Vertical
position is open, horizontal is closed)
d. Gray & black tank knife drains.
5. Open all water fixtures.
a. Sinks
b. Toilet (Flush)
c. Shower
d. Exterior shower
6. When water has stopped flowing from all openings, close the
drains and fixtures.
7. Turn the handles to a 45 degree angle as shown in the
Nautilus Panel Winterizing Instructions.
8. Connect an air hose to the city water connection. You will
need an adaptor with a pressure gauge.
9. When blowing out the system with air, DO NOT exceed
30 PSI pressure in the plumbing lines. Damage may
occur to the inline water regulator and other plumbing
components. The freshwater tank overflow drain is always
open, so the tank does not become pressurized with either air
or water. The fresh water tank should never have more than 2
PSI pressure in it.
10. Blow air into the system and, always keeping one drain open,
open each fresh water drain one by one until no more water is
released.
a. Fresh water tank drain
b. Low point drains (Red and blue Alde drain valves)
c. Hot water tank drain (Yellow Alde drain valve. Vertical
- open, horizontal - closed)
11. When the water is all drained out of the lines and all openings
are closed, turn off and disconnect the air hose.
12. Turn the handles to Winterize mode as shown in the on the
Nautilus Panel Instructions.
