SECTION 10
PLUMBING SYSTEMS
10-6
in suspension, allowing them to be carried out
with the liquids when the dump valve is opened.
If the valve is left open, the liquids will drain off,
leaving solids in the tank. Should this accidental-
ly happen, disconnect the hose, fill the tank about
half full with water, and drive a few miles to dis-
lodge the solids. A few starts and stops will aid in
the process. Then reconnect the hose and drain in
the normal manner.
Holding Tank Level Indicators
The holding tanks may be monitored on the
wall mounted monitor center.
Press the “Levels Test” switch to check the
appropriate level in each tank.
See Section 6 for further information on the
monitor panel.
HOLDING TANK HEATERS -
Optional
Your coach may be optionally equipped with
black water and grey water holding tank heaters
to allow use of waste utilities in freezing temper-
atures. The holding tank heater power switch is
located near the monitor panel. The illuminated
switch will glow when the power is on.
DO NOT operate the holding tank heaters un-
less you are providing a supplemental 12-volt
power source to recharge the house batteries.
This means either the shoreline cord must be
plugged into a 110-volt source, or the auxiliary
generator must be operating, or the chassis
engine must be running (such as when driving
down the road). These three sources can prevent
excessive discharge of the house battery.
NOTE: The holding tank heater pads are electri-
cal resistance type heating elements.
This type of heating element typically
uses a large amount of current while
operating. If the tank heaters are used
without a recharging source, they will
drain the house batteries in a relatively
short period. Typically the batteries
would not support overnight heating
without a supplemental charging source.
WATER LINE & TANK DRAIN
VALVES
The water drain valves are used to drain water
from the water tank and the water supply lines
when preparing the motor home for storage or
when sanitizing the water system.
To open or close the drain valves, turn the
handles in the directions indicated by the follow-
ing illustration.
Drain valve locations are listed on the follow-
ing pages.
D R A I N
D R A I N
C L O S E
C L O S E
I N - L I N E
V A L V E
L I N E - E N D
V A L V E
Water Drain Valves
(typical)
