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SECTION 7
PLUMBING SYSTEMS
7-4
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 is commonly called the
black
water
tank. The second holding tank contains the
waste water from the galley sink, bathroom lava-
tory and shower, and is commonly called the
grey
water
tank.
The two holding tanks are both dumped
through a common outlet located on the left side
of the vehicle, near the rear wheels.
DUMPING HOLDING TANKS
1. Remove drain hose from waste valve com-
partment.
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 (large) black water tank valve with
a quick pull. OPEN ONE VALVE AT A
TIME. Move hose gently about to dislodge
any waste and to ensure complete drainage.
5. Close sewage valve and open (small) grey
water valve with a quick pull. Make sure
there are no sags in the hose during drainage.
Close valve handle as soon as tank is empty.
6. After both tanks have been drained, run sev-
eral gallons of water into the sewage tank
through the toilet. Then open sewage dump
valve and drain the tank again. Close valve
and replace dust cap securely.
7. It is advisable to add an odor control chemi-
cal to the sewage holding tank. These chemi-
cals are available at most R.V. stores.
8. Rinse sewer hose thoroughly with water and
stow.
NOTE: We recommend that you dump all hold-
ing tanks before traveling to avoid carry-
ing unnecessary weight.
USING ON-SITE SEWER HOOK-UPS
The drain hose may remain attached to the
dump outlet and be routed out the bottom of the
compartment while the motor home is parked and
connected to an on-site sewage hook-up.
When using a sewer hook-up, keep the dump
valves closed until a tank becomes full or when
preparing to leave the site. This keeps the solids
in suspension, allowing them to be carried out
with the liquids when the dump valve is opened.
If the valve is left open, the liquids will drain off,
leaving solids in the tank. Should this accidental-
ly happen, disconnect the hose, fill the tank about
half full with water, and drive a few miles to dis-
lodge the solids. A few starts and stops will aid in
the process. Then reconnect the hose and drain in
the normal manner.
Holding Tank Heaters - Optional
Your coach may be optionally equipped with
black water and grey water holding tank heaters
to allow use of water utilities in freezing temper-
ature. The tank heater power switch is located
near the utility systems monitor panel. The illu-
minated switch will glow when the power is on.
Do Not Operate the holding tank heaters
unless you are providing a supplemental 12-volt
power source to recharge the house batteries.
This means either the shoreline cord must be
plugged into a 110-volt source, or the auxiliary