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BLACK TANK FLUSH (IF EQUIPPED)
The black tank flush inlet is typically located either
on the utility center panel (if equipped) labeled as
"Tank Flush"; or on the side or back of the RV with a
caution label next to it.
The black tank flush inlet is connected to a black
water holding tank sprayer connection, allowing you
to remove debris and prevent accumulation. A
check valve is incorporated in the plumbing lines to
prevent back flow. Flush the black water tank each
time the grey and black holding tanks are dumped
or as needed.
Utility center (if equipped) valve positions do not affect the tank flush
function. It does not matter where they are positioned when operating
the tank flush.
To help insure debris does not clog the tank sprayer orifices, use
"TANK FLUSH" every time the waste holding tank is emptied.
1.
Dump the black water tank (see "BLACK AND GREY TANK
DRAINS" on page 72) and LEAVE THE BLACK TANK
DRAIN VALVE OPEN.
2.
Connect a garden hose from the water supply source to the black
tank flush.
3.
Turn the water source turned ON, flushing the black water
holding tank until the water running out of the black tank drain
valve is clear (not discolored or cloudy).
4.
Turn off the water source, disconnect the garden hose, and close
the black tank drain valve. Fasten the waste pipe cap back on
the RV tank flush exit.
Winterize the Black Tank Flush
1.
Black tank should be flushed and empty prior to winterizing.
2.
Connect a blowout plug to the Black Tank
Flush inlet.
3.
Colored valves have no effect on the black
tank flush inlet.
4.
Connect the air hose from a compressor to
the blowout plug. Set the compressor to 30 PSI maximum.
5.
Open the black tank drain gate valve and remove the waste pipe
cap.
If the RV has a macerator system, you need to open the bypass valve
for the macerator under the RV. This will allow the black tank to drain
through the 4" sewer hose.
6.
Blow air into the flush inlet for 30 to 60 seconds.
7.
Disconnect the air hose, compressor and blowout plug.
8.
Close the black tank drain gate valve, install the waste pipe cap,
and close the macerator bypass valve (if applicable).
Page 74
PLUMBING SYSTEM
(See page 78 & page 79)
Exterior Black Tank
Flush Inlet Example
Blowout Plug Example
TANK HEATERS (IF EQUIPPED)
(See page 79)
Your RV may be equipped with heaters for the fresh, gray, black water
tanks, and the water lines or drain lines. These heaters will prevent
water in the tanks and lines from freezing down to -11°F (-24°C)
(contingent on RV setup).
The larger tank heaters are 120VAC and attach directly to the tanks.
The thermostat controlled tank heaters will cycle on at 44°F (7°C) and
off at 64°F (18°C). Water line or drain line heaters are smaller and
operate on +12VDC and will be attached to the water lines or drain
lines. The +12VDC heaters stay on constantly.
All of the heaters are controlled by a single ON/OFF switch that is
typically located on the command center panel or in the bathroom.
The switch lights up red when ON and controls the heater circuit.
The tank heater switch should be turned ON:
•
When liquid is present in the holding tanks and the outside
temperature approaches and maintains freezing conditions 35°F
(2°C) or colder.
The tank heater switch should be turned OFF:
•
When there is NO liquid present (tanks are empty).
•
When dumping the black and gray holding tanks and the drain
pipes.
•
When fresh water tank and supply lines are empty or being
drained for storage.
•
When the RV is connected to city sewer and the gate valves are
open.
Leaving the drain valves open at all times while camping is never
recommended, especially in cold weather use.
•
When ambient temperatures rise and remain above freezing.
No maintenance on the heaters is required, only a periodic inspection
for loose wires, damage, etc. For additional detailed information, refer
to the tank heater manufacturer's user guide.
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