WATER SYSTEMS — 6
136
20 08 CONTESSA
Waste Drain & Sewage Tanks
The waste drain system provides adequate and
safe storage and/or discharge of waste materials.
The drain system uses ABS plastic piping and
ttings connected to sinks, shower, toilet and
holding tanks draining to an outside termination.
The motorhome should be reasonably level
for optimum operation of the waste systems.
The wastewater holding system consists of a
grey water tank that stores the sink, shower and
laundry washer drain water, and a black holding
tank that stores waste from the toilet.
Drain valves and a tank ush system dispose
of waste through a common termination. Each
holding tank has a separate drain valve dumping
the waste water (grey water) and sewage (black
water) through a common single discharge outlet.
The tank drain valves are located service center on
the roadside. Use the hallway monitor to observe
tank levels. When ready to drain the tanks, drain
the sewage tank rst. Next, ush the black tank
with the ush system. Close black tank valve after
ushing tank. Drain the grey water tank. Using this
sequence helps to ush solids from the sewer hose.
It is recommended that both holding tanks are less
than half full when traveling.
Waste Drain System
The waste drain system includes waste valves
and a exible sewer hose. When it is time to
dump either the grey or black holding tanks,
connect the exible sewer hose to the dump port
at the service center. Place the other end of the
hose in the appropriate waste dump site, and
open the desired tank valve.
A exible, 3" sewer hose connects the
termination drain and the shore facility. Sewer
hoses usually come in 10 or 20 foot lengths. The
sewer hose is stored in a tube accessed through a
door on the roadside next to the service bay. The
shore tting for the sewer hose may be a three or
four-inch, male or female thread pipe; or a four-
inch pipe with no threads, covered by a metal
plate. Different styles of adapters are available
to t most congurations. Hose ladders may also
be purchased to support the hose.
It is important that the hose remains secure.
Always tighten clamps and restraining devices
before use. Lay the hose in line between the
termination outlet and the shore tting. Restrain
the hose to prevent movement during use.
Wear protective and/or disposable gloves when
handling the sewer hose.
To Attach the Hose:
Remove sewer hose from carrier.
Unscrew the access deck plate and feed
the drain hose through the opening.
Remove termination cap. Align coupler
tangs with termination tabs. Twist
coupler clockwise 90º to lock the coupler
to the termination outlet.
Attach the other end of the hose to the
drain service. Restrain hose to prevent
movement during use.
Open the grey water valve.
The black water valve remains closed until
the tank is full or until time of departure to help
prevent clogging. Use the outside faucet or
shower attachment for washing or rinsing the
sewer hose after dumping the black tank.
LUBE:
Lubricate the O-ring on the sewer hose
adapter periodically with silicone spray.
NOTE:
Close the grey water valve 24 hours
prior to departing to allow the tank to
fill with liquid to help in the dumping
process.
NOTE:
Use care when connecting the sewer
hose adapter to the termination outlet in
cold weather.
040422
040422g
Tighten clamps before use
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