SECTION 7 –
PLUMBING
7-8
See winterizing instructions at the end of this
section to prepare the toilet for storage in freezing
conditions.
Further Information
See the toilet manufacturer’s operation
information in your InfoCase for complete
operating, care, and maintenance information.
DRAINAGE SYSTEM (P-TRAPS)
Ensure there is an adequate amount of water in
the drainage system p-traps to avoid sewer odor
from entering your coach.
If you should experience a sewer odor, pour
approximately 1 cup of water down each sink and
shower drain in the coach.
WASTE WATER SYSTEM -
MODEL 25P
(Holding Tanks)
The drainage system is self-contained and
uses two separate holding tanks to contain the
waste 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 black water holding tank contains the
sewage from the toilet and may include bathroom
lavatory on some models. The gray water holding
tank contains the waste water from the galley
sink and shower, and may include bathroom
lavatory.
See “Specifications” in
Section 1–
Introduction
for tank capacities for your model.
Dumping Holding Tanks
1. Remove sewage drain hose from cylindrical
compartment located behind the driver’s side
rear luggage door.
2. Remove dust cap from sewage drain outlet
and connect sewage drain hose. Be sure it is
firmly attached.
3. Place the outlet end of sewage drain hose into
disposal opening.
4. Open the Black Waste Tank Drain valve with
a quick pull and make sure there are no sags in
the hose. Move the hose gently about to
dislodge any waste and ensure complete
drainage. Close Black Waste Tank Drain
valve as soon as tank is empty.
Sewage Drain Outlet
(Located underneath coach
behind driver side rear wheel)
-Typical View
Holding Tank Drain Valves
(Located in water service center)
-Typical View
1st - Pull
Black
Waste
Tank Drain
valve to
drain Black
Water
(sewage)
tank – then
close.
2nd - Pull Gray
Waste Tank Drain
valve to drain
Gray Water (sink/
shower) tank –
then close.
