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1. Dump the black water tank (see Gray Tank Drain & Black Tank Drain) and leave the
black tank drain valve open.
2. Connect a garden hose from the water supply source to the black tank ush.
3. With the water source turned ON, ush the black water holding tank until the water
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 ush inlet.
1. Black tank should be empty prior to winterizing.
2. Rinse the black tank prior to blowing it out with air.
3. Attach the 4” sewer hose to the dump connector under the RV.
4. Open the waste gate valve for the black tank (under the RV).
5. Attach a garden hose to the TANK FLUSH inlet at the utility center.
6. Attach the other end of the hose to a pressurized water source. Turn water on.
7. Flush tank until water appears clear in 4” sewer hose.
8. Turn o water, disconnect the hose from faucet, disconnect hose from tank ush.
9. Connect the blowout plug to the Black Tank Flush inlet at the utility center panel.
10. Colored valves have no eect on the black tank ush inlet.
11. Connect the air hose to the blowout plug. Set the compressor to
12. Open the black tank drain gate valve, macerator bypass valve is open also.
13. Blow air into the ush inlet for 30 to 60 seconds.
14. Disconnect the air hose, compressor and blowout plug.
15. Close the black tank drain gate valve and close the macerator bypass valve.
With xtures and drain valves open in the RV to drain the water lines, connect the blue-
coiled hose to the brass quick connect tting at the Spray Port.
The black tank drain valve must be OPEN any time there is a hose (water
supply) connected to the black tank ush.
Do not leave any hose (water supply) connected to the black tank ush
when it is not in use.
Do not use the same hose to ll your fresh (potable) water tank that is used for
the black tank ush.
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