caution - Thor Motor Coach

Note: When filling the system, you may want to add additional
water to the tank to replace the water used when filling
the hot water tank and water lines.
The fresh water storage tank supplies potable water to all fixtures within your motorhome
by means of a 12 Volt water pump. This pump is located close to the storage tank
and is equipped with a check valve that ensures directional flow away from the tank.
The pump has an on/off switch, which is located on the monitor panel, bathroom, or
termination compartment. The pump will automatically build up pressure and maintain
that pressure when turned on. The pump should be turned off when the fresh water
tank is empty or when the motorhome will not be in use. Continued operation with
a dry tank may damage the pump. Your pump has a filter on the inlet side. This filter
should be cleaned after each tankful of water for the first few uses. To remove the cover
press in firmly and twist counterclockwise about one eighth turn. Pull the screen out
of the bowl and rinse clean. Reassemble in the reverse fashion. For more information
check your water pump Owner’s Manual located in your Owner’s Information Kit.
Low point drains are located either in the holding tank compartment or in a rear storage
compartment on the driver’s side of the coach. These drains are used when the system
is to be completely cleared of water.
You should sanitize and disinfect the fresh water system upon delivery of the unit and
at least once per year or whenever the motorhome is unused for prolonged periods
of time. This will help keep your water system fresh and discourage the growth of
viral and bacterial contamination, which may be contained in your water supply. Use a
chlorine and fresh water rinse as follows:
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 4-2/3 gallons of the solution to a 70 gallon tank.
Add 5-1/3 gallons of the solution to a 80 gallon tank.
Add 6 gallons of the solution to a 90 gallon tank.
Add 6-2/3 gallons of the 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.
Water Systems
LOW POINT DRAINS
SANITIZING THE
SYSTEM
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