Wastewater Systems - Tiffin Motorhomes 2014 Allegro Owner's Manual

TIFFIN MOTORHOMES
WASTE WATER SYSTEMS
General Information
The waste drainage system was designed to provide adequate and safe storage and/or disposal of waste
materials. All of the materials used in the fabrication of this system are tested by a nationally-recognized
testing laboratory. The drainage system uses plastic piping and fittings connected to the sinks, toilet, and
holding tanks. This plumbing permits the drainage of these fixtures to an outside termination.
The vehicle should be reasonably level for best operation of both of the wastewater systems (there are
two, separate wastewater systems). The gray-water system is for wastewater from the sinks and shower.
The black-water system is for sewage waste from the toilet. Each wastewater tank has its own control
valve and both drain through a common sewer-drain hose.
Toilet
The toilet (Figure 11-9) operates with water from either the fresh water tank with the water pump "on" or the city water
supply. Before using the toilet, add water to the bottom of the tank. Refer to the "BLACK WATER TANK" instructions
elsewhere this chapter. The toilet flushes waste directly into the black-water holding tank. The toilet uses high-velocity
Figure 11-9. Toilet
P-Traps
Each of the sink drains, the shower drain, and the washing-machine drain (if so equipped) has a water trap (Ptrap)
to prevent holding-tank odors from entering the vehicle. These traps must have water in them to trap odors. When the
vehicle is in motion, the water may splash out of the sink and shower drains. When vehicle is stored, the water may
evaporate from these traps allowing odors to enter the vehicle. If this occurs, run water from the faucet into the drain,
thus allowing water to fill the traps again.
–ALLEGRO®
water injection to produce swirl effect in the bowl.
The greatest problem that causes stool solids to accumulate in the holding tank is lack
of liquids. When using your toilet, it is wise to fill the toilet ¾ full of water--this will help
wash the solids away from directly below the toilet and to assure complete dumping of
the holding tank. To add water to the toilet bowl, push down on the flush lever. To
flush the toilet, push down on the lever until the water swirls. A small amount of water
should remain in the bowl.
The toilet should be cleaned regularly for maximum sanitation and operational
efficiency. Clean the toilet bowl with a mild bathroom cleaner. DO NOT USE
CHLORINE OR CAUSTIC CHEMICALS, SUCH AS LAUNDRY BLEACH OR DRAIN-
OPENING TYPES, AS THEY WILL DAMAGE THE SEALS IN THE TOILET AND DUMP
VALVES.
Refer to the toilet-manufacturer's owner's manual in your Allegro Owner's Information
Package for complete instructions and a detailed troubleshooting guide.
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Chapter 11 PLUMBING & BATH FIXTURES
11-7