Tiffin Motorhomes Allegro Bus 2011, Owner'S Manual

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P L U M B I N G & B A T H F I X T U R E S
11-10
during self-containment use to prevent leakage of waste materials onto the ground or pavement. Do not pull
the holding tank gate valve “open” when the protective cap is installed on the pipe. Always drain the tank into
an acceptable sewer inlet or dump station.
Whenever possible, drain both the holding tanks prior to traveling. The carrying capacity of your vehicle
will be reduced if water is left in the black or gray tanks.
The holding tanks should only be drained when they are at least ¾ full. Doing this will provide a
sufficient volume of water to allow the complete flushing of waste materials in the drain lines and hose.
If the tanks are not ¾ full, add enough water to allow for sufficient flushing.
To empty the wastewater tanks, connect the adapter, supplied with your vehicle, to the drain hose. If the
adapter is lost or broken, another one can readily be purchased from any RV supply store. Once you
have placed the adapter on the drain hose, it can remain there for the life of the hose. One end of the
hose threads up through the hole in the bottom of the
service compartment and the other end of the hose
feeds into the sewer at the dump station.
Unscrew the cap from the drain. Connect the hose,
with the adapter in place, to the drain fitting. Open
the gate valve completely by pulling on the T-handle.
The tank will start to drain as soon as the T-handle is
pulled. After you have drained the black-water tank,
immediately drain the gray-water tank. This procedure
helps to flush the black water from the sewage hose.
When both of the tanks are empty, flush them with a
freshwater rinse before you close the valves. The gray
tanks are easily flushed by pouring a couple of gallons
of water into a sink drain. The drain outlet is engineered for quick release of the drain hose adapter.
Always close the gate valves and secure the end cap to prevent leakage while the vehicle is in transit.
After draining the black-water tank, it is recommended to add a holding-tank deodorant to help control
the odor and break down the solids. Follow the instructions given on the holding-tank deodorant
package.
When using dump stations for draining the holding tanks, keep other travelers in mind. Please practice good
housekeeping! Leave the dump stations in good order. Above all,
do not pollute !
Sewer Connection and Camping
When camping at parks with sewer connections, it is important to keep the black-water, holding-tank, gate
valve closed at all times, except when dumping. The gray tank can be kept open while hooked to a sewer
connection, but again, the black-water tank must be kept closed. This is done so that an ample quantity of
liquid remains in the tank to provide a smooth flow through the gate and drain valves when dumping.
Figure 11-14. Sewer Hose and Drain Connections