Heated Holding Tanks; Dumping Holding Tanks - Thor Motor Coach 2011 Avanti Owner's Manual

Chapter 6 - Plumbing Systems
WASTE WATER
SYSTEM
HEATED HOLDING
TANKS
DUMPING THE HOLDING
TANKS
40
1. Drain the fresh water tank by opening the drain valve. All of the faucets should be
in the closed or off position.
2. Prepare a solution of 1/4 cup household liquid chlorine bleach (5% sodium
hypochlorite) to one gallon of water for every 15 gallons of tank capacity. Do not
pour bleach straight into tank. Bleach must be diluted in water prior to filling.
Example: Add four 2/3 gallons solution to a 70 gallon tank.
Add five 1/3 gallons solution to a 80 gallon tank.
Add six 1 gallon solution to a 90 gallon tank.
Add six 2/3 gallons solution to a 100 gallon tank.
This mixture puts a 50 PPM (parts per million) residual chlorine concentration
in the motorhome's water tank. This will act as quick-kill dosage for some
harmful bacteria, viruses, and slime-forming organisms. Concentrations higher
than 50 PPM may damage water lines and/or tank.
3. Close all faucets and drains, and fill the fresh water tank with the rinse solution
through the potable water fill.
4. Turn on the pump switch and circulate the rinse solution throughout the entire
system.
5. Once the rinse solution has been circulated through the entire system, fill the fresh
water tank until it is full.
6. Close all faucets and drains and let the system sit for approximately three (3)
hours.
7. Drain the entire system.
8. Flush the complete system with fresh water until chlorine odor disappears.
9. Finally, close all drains and fill the fresh water tank as you normally would. Make
sure the water heater has water in it prior to igniting.
Chlorine is poisonous. Recap bottle and clean any appliances used
with soap and water.
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.