Heated Holding Tanks; Dumping Holding Tanks - Thor Motor Coach tuscany 2013 Owner's Manual

The waste water system is comprised of dual holding tanks with individual termination
valves. The holding (solid waste) tank as indicated on your monitor panel, collects all the
waste material from the toilet. The gray water tank collects all of the liquid waste material
from the sinks, drains, and showers. Both tanks are joined together after the termination
valve to provide a single termination outlet for convenient dumping of waste materials. A
flexible sewer hose ( which is not provided) is required to make the connection between
your unit's termination valve and the approved dump station inlet.
The drainage system is very similar to that of your home. The system is trapped and
vented to prevent waste gases from entering your motorhome. The drain piping is made
of ABS material and is resistant to most chemicals. The "P" traps at the sinks, showers
and tubs are available for use as clean-outs if necessary.
Your vehicle's holding tank compartments are heated by the furnace duct work. It will
heat the tanks when the furnace is operating.
As mentioned previously, your holding tanks terminate together at one location for
convenience in dumping your tanks. A twist-on cap is located at the terminal outlet to
help prevent leakage of materials.
The holding tanks are enclosed sewer systems, and must be drained into an
approved dump station. Tanks should be thoroughly drained and rinsed to
prevent any accumulation on the interior of the tanks.
1. Twist off the termination cap counterclockwise. Some liquid may be trapped
between the valves.
2. Connect the sewer hose by turning it clockwise, making sure that the connection
end levers are locked over the termination end.
3. Deposit the other end of the sewer hose into an approved dump station inlet.
4. Open the black termination valve first and drain.
5. Open the gray (smaller) tank valve to drain and flush out the hose.
6. Rinse the tanks and hose thoroughly with fresh water before disconnecting.
7. Close the termination valves.
8. Rinse the sewer hose with the faucet provided in the termination
9. Replace the sewer hose to the storage location.
10. Replace the termination cap on the outlet, making sure that it is secured and locked.
11. You may wish to add an approved deodorant chemical, approved for your
sewer system, to aid in the breakdown of solid wastes as well as making your
system more pleasant to use.
Chapter 6 - Plumbing Systems
WASTE WATER
HEATED HOLDING
TANKS
DUMPING THE
HOLDING TANKS
compartment.
SYSTEM
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