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4.
Open the waste gate valve for the black tank (under the RV).
™ NOTE: 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.
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.
Turn off water, disconnect the hose from faucet, disconnect hose from tank flush.
8.
9.
Connect the blowout plug to the Black Tank Flush inlet at the utility center panel.
10. Colored valves have no effect on the black tank flush inlet.
11. Connect the air hose to the blowout plug. Set the compressor to 30 PSI maximum.
12. Open the black tank drain gate valve, macerator bypass valve is open also.
13. Blow air into the flush 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.
Draining the Spray Port
With fixtures and drain valves open in the RV to drain the water lines, connect the blue-
coiled hose to the brass quick connect fitting at the Spray Port.
1.
Remove the spray nozzle from the other end of the hose.
2.
Hold the open end of the hose near the ground and any water in the
line should drain out.
Disconnect the hose from the fitting, and store in the RV.
3.
4.
Close the port cover.
Winterizing the Spray Port with Antifreeze (if so equipped)
1.
As you are putting antifreeze into the water lines, attach the hose
to the Spray Port.
2.
Have a container close by to capture antifreeze.
3.
Pull the trigger on the spray nozzle until antifreeze comes out (into the container).
4.
Release the nozzle and disconnect the hose from the port.
5.
Rinse out the hose before storing it.
Tank Heaters (if so equipped)
Your recreation vehicle 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 recreation vehicle setup).
The larger tank heaters are 120VAC and attach directly to the tanks. The thermostat con-
trolled 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.
Section 8: Plumbing System
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