SECTION 7
PLUMBING SYSTEMS
7-4
To open or close the drain valves, turn the
handles in the directions indicated by the follow-
ing illustration.
WASTE DRAINAGE SYSTEM
The drainage system is self-contained and
uses two separate holding tanks to contain the
water until it can be dumped at an appropriate
waste water disposal site. This means you can use
the toilet, sinks and shower even in areas where
utility hookups are not available.
The main holding tank contains the sewage
from the toilet, and waste water from the bath-
room lavatory and shower. It is commonly called
the black water tank. The second holding tank
contains the waste water from the galley sink,
and is commonly called the gray water tank.
Holding Tanks
The black water tank holds waste
water from the toilet, lavatory, and
shower.
Black (Sewage) Tank.......... 13 gals.
The gray water tank holds waste
water drained from the galley sink.
Gray (Waste Water) Tank
Model 22QD ......................... 9 gals.
Models 22FD/22HD ............. 6 gals.
HOLDING TANK LEVEL INDICATORS
You can check the levels of the waste water-
holding tanks and the fresh water tank using the
monitor panel.
Press the button labeled “Gray Tank” or
“Black Tank” to show the level in each tank.
See Section 8 - Appliances for more informa-
tion on the monitor panel.
DUMPING HOLDING TANKS
The holding tanks are dumped through a
common outlet located on the left side of the
vehicle, near the rear wheels. The sewer drain
hose is stored in a compartment inside the gener-
ator door on the right side toward the rear of the
vehicle.
1. Remove drain hose from hose compartment.
2. Remove dust cap from drain and connect
drain hose. Be sure it is firmly attached.
3. Place the other end of sewer hose into dis-
posal opening.
4. Open the sewage valve with a quick pull.
OPEN ONE VALVE AT A TIME. Move
D R A I N
D R A I N
C L O S E
C L O S E
I N - L I N E
V A L V E
L I N E - E N D
V A L V E
Aux.
Genera
tor
Sewage
Drain Hose