Airstream Rangeline 2023, Owner'S Manual

Page: 94 / 118

Maintenance
9-8
2023 Rangeline
Drain and Waste System
Your touring coach has a drain and waste system that
includes waste-holding tanks made from corrosion-
free, molded plastic with trouble-free dump valves�
The black water holding tank enables you to use the
toilet for several days away from disposal facilities�
The wastewater from the lavy sink, shower, and galley
drains into the gray water holding tank� Each tank
has a dedicated dump valve with both tanks draining
through a common outlet� Only one sewer hose
connection is needed when hooking up to a dump
station�
Check the tank levels on your multiplex screen
regularly� The toilet bowl cannot be emptied if the black
water tank is full� If the gray water tank is full, drain
water will back up into the shower floor pan.
Draining the tanks as described in this section will
protect them from freezing during storage� When
traveling in sub-freezing temperatures, use a
winterizing solution designed for RV use� Follow the
directions on the container�
Never drain the tanks at any place other than an
approved dumping station� Almost all campgrounds
will have dumping facilities� Park directories, such as
Woodalls and Rand McNally, also list dumping stations�
Furthermore, the vehicle navigation system may be
able to locate nearby dumping stations or have the
capability to mark/save stations along your route�
WARNING
Never put wet strength paper towels or tissues
in your holding tank since they will not dissolve
and can catch in the mechanism of the dump
valve. Colored toilet tissue is slower to dissolve
than white. Most motorhome accessory stores
offer tissue designed for RVs that will completely
dissolve.
Black and Gray Water Tank Draining
4
1
2
3
1� Gray Tank Valve
2� Drain Hose Hookup
3� Black Tank Valve
4� Courtesy Light
Dump the black tank before the gray tank� Doing so will
help rinse the sewer line with gray tank water�
To empty one or both tanks:
1� Remove the sewer drain hose from the storage
tube under the coach, below the right rear door,
and remove the caps�
2� Attach the outlet adapter to the clear-view elbow
outlet on the end of the drain hose�
3� Attach the hose to the coach’s drain hose hookup
by pressing the bayonet fitting onto the outlet.
Rotate clockwise until it feels solid and secure�
4� Attach the outlet end (clear-view end) of the hose
to the dump station’s inlet, ensuring the hose is
positioned to drain completely�
5� Pull the black plastic “T” handle to open the
black tank dump valve, allow the tank to drain
completely, and close the dump valve�
6� Use the black tank flush (located in the Water
Service Compartment) to partially refill the tank
with clean water and repeat the process until clean;
see Black Water Tank Flush on page 9-9 and see
Water Service Compartment on page 6-6�
7� Continue flushing the black tank to remove all
paper and waste material, indicated by clear
running water� Close the black tank valve�
8� Pull the gray plastic “T” handle to open the
gray tank dump valve, allow the tank to drain
completely, and close the dump valve�