WATER SYSTEM
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CUSTOMER CARE | 877.855.2867
Typical motorhome
toilet installation
Wastewater System Introduction
e motorhome's waste water system consists of bathroom
fixtures, drainage plumbing, wastewater holding tanks,
drainage vents, and sewage valves. It is important to become
familiar with the motorhome’s wastewater system, for it does
require monitoring, routine, and long-term maintenance.
Drainpipes
Drainpipes have P-traps and/or waterless traps (HEPVOs)
installed to help prevent drain odors from escaping into
the motorhome. During travel, water within P-traps may
displace, which could allow wastewater system odors into the
motorhome. Drain-related odors come from decomposing
materials in the holding tank. If odors are detected, place a
few cups of water down each drain and use a RV approved
deodorizing agent, which will reduce drain odors and help
keep the drain lines and tanks clean and free owing. Drain
chemicals are available at RV supply stores.
Vents
Vent pipes and vents release air from the gray and black
water holding tanks. e exterior vent cap is attached to
the roof and must be kept clear of debris and obstructions
to perform as intended. On some brands and models, the
vent pipe may be part of the drainage system referred to as
a “wet vent” (water ows downward as air ows upward in
the same pipe).
Wastewater Holding Tanks
e motorhome is tted with waste holding tanks designed
to separately collect wastewater and waste solids. Typically,
wastewater from kitchen sinks, bathroom sinks and bathroom
shower(s) is collected and stored in the Gray Water tank,
while solids from bathroom toilet(s) is collected and stored
in the Black Water tank. Some oor plans have two black
holding tanks, while others may drain bathroom sinks and/
or the shower into the black tank. Wastewater collection
tanks have valves that allow for emptying the tanks into an
external sewage collection facility, commonly known as a
‘dump station.’
When traveling, it is good practice to minimize the wastewater
(gray and black) carried in the motorhome. is will reduce
the on-board wastewater weight, potentially allowing carrying
capacity for other cargo items. Refer to Section 6, Occupant
and Cargo Carrying and Capacity (OCCC).
NOTE: Monitoring the level of wastewater within the holding
tanks is provided for on the Monitor Panel or, if equipped,
on the main Multiplex touchscreen panel. Typically, tank
level is indicated in 1/3 increments.
Toilet
e toilet installed in the motorhome is designed to provide
convenient and trouble-free operation when used properly.
Unlike most residential toilets, RV toilets are tank-less, meaning
that the user lls the bowl just prior to use. Most toilets are
operated by a foot-actuated pedal, located either on the right
side or front of the toilet bowl. e toilet installed in your
motorhome may dier than the illustrations included in
this manual. Always follow the manufacturers operating
instructions.
To use:
1. Turn ON the on-board water pump or connect the water
system to an external pressurized source.
2. Add water to the toilet bowl by stepping partially down
and holding the ll/ush pedal until the bowl is about
1/2 full.
Remove the waterless trap before using mechanical
drain-rooting devices. Otherwise, the waterless trap
can be damaged.
NOTICE
Some RV toilets have a black tank full signal, which
prevents ushing water from entering the bowl until
the black tank has been emptied. Check with the
manufacturer or your dealer to determine whether the
toilet installed has this feature.
Follow all manufacturer’s instructions associated with
the toilet, regardless of type, including preparation, use,
waste disposal, cleaning, maintenance, cold weather
use, winterizing, and storage.
NOTICE
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