Tiffin Motorhomes 2014 Phaeton, Owner'S Manual

Page: 96 / 150

TIFFIN MOTORHOMES –PHAETON® Chapter 11 PLUMBING & BATH FIXTURES
11-9
Gray-Water Holding Tank
The gray-water holding tank is located in the underbelly of the vehicle. It is primarily used for the drainage
from the kitchen and bath sinks and the shower.
Wastewater Disposal
Both of the holding tanks terminate in a valve arrangement that permits draining each tank separately or together. It is
recommended to drain the black-water tank first before draining the gray-water tank. This procedure permits the water
from the gray tank to wash the black-water residue from the drain lines and hose. The valves that open to release the
water are called gate valves.
The blade that closed the opening in the sewer drainpipes is
connected to the T-handle to release contents of the tank(s)
when pulled. The sewer line must be securely capped 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 . 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. 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 (Figure11-11). 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!
Figure 11-11. Sanitation Coupling, Valve, and Hose