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Plumbing Systems and Holding Tanks
06-8
SPRAY
NOZZLE
Typical Utility Compartment
If the drain system does get clogged:
• Use a hand-operated probe to loosen
stubborn accumulations.
• Seriously clogged P-traps may require
disassembly. Be careful not to overtighten
when reassembling.
• Do not use harsh household drain cleaners.
• Do not use motorized drain augers.
• Sometimes the holding tank valve will get
clogged. In this case, a hand-operated auger
may be necessary. Be ready to close the valve
quickly once the clog is cleared. If the seal
gets damaged, it is easily replaced.
Cold Weather Usage
The holding tank(s) area is heated through ducts
from the coach heating system. To prevent
holding tank freeze up, the furnace thermostat
should be set to maintain a minimum of 35
degrees Fahrenheit in the holding tank(s) area, Be
aware that exposed drains may freeze quickly.
To assist cleaning a black tank use approximately
10 pounds of “cube” ice and one pound of rock
salt. Put the ice and rock salt in the tank. Drive the
vehicle for approximately 15 to 20 minutes.
The ice will help “abrade” the inside of the tank
and remove solid matter. Drain the tank after the
ice has melted and flush with clean water.