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Section 8: Plumbing System
The black tank drain valve must be OPEN any time there is a hose (water
supply) connected to the black tank flush.
Do not leave any hose (water supply) connected to the black tank flush
when it is not in use.
Do not use the same hose to fill your fresh (potable) water tank that is used for
the black tank flush.
Black Tank Flush (if so equipped)
The black tank flush (no fuss flush) inlet is typically located on
the utility center panel. The location may vary depending on
your model. Attach a garden hose (connected to a pressurized
fresh water source) to the black tank flush inlet. The water goes
directly into the black water holding tank sprayer connection,
allowing you to remove debris and preventing 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 water holding tanks are dumped or as needed.
NOTE: The color-coded valve positions
do not affect the tank flush function. It
does not matter where they are posi-
tioned when operating the tank flush.
Refer to the Uni-Dock Utility Center
Dump the black water tank (see Black and Gray Tank Drains) and leave the black tank
1.
drain valve open.
Connect a garden hose from the water supply source to the black tank flush.
2.
With the water source turned ON, flush the black water holding tank until the water
3.
running out of the black tank drain valve is clear (not discolored or cloudy).
4.
Disconnect the garden hose and close the black tank drain valve. Fasten the sewer hose
housing dust cap back on the tank flush inlet.
The black tank drain valve must be OPEN any time there is a hose
(water supply) connected to the black tank flush.
Do not leave any hose (water supply) connected to the black tank
flush when it is not in use.
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Troubleshooting
