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SECTION 5
PLUMBING SYSTEM
B
G
W
LACK/
REY
T
ANKS
WARNING
Never travel with full black or grey water
holding tanks. This not only wastes your
fuel but depending on the location of the
tank(s), it can affect your tow vehicle
handling characteristics.
The weight of the holding tank contents is not
calculated into the RV cargo carrying capacity
(this extra weight would reduce your available
cargo capacity). Traveling with full holding
tank(s) could possibly cause you to exceed the
individual tire ratings and/or the RV GAWR or
RV GVWR. Potential damage to suspension
components, such as springs, tires and axles,
could result. If your RV holding tank(s) are
located behind the axles, the weight of the full
tank(s) will reduce the hitch weight. Trailer
sway and other handling difficulties can be the
result of the hitch weight being too light.
Dump the gray and black water holding tanks
before traveling to avoid carrying unnecessary
weight. If you are dry camping and cannot
immediately empty your holding tanks, reduce
your vehicle speed until you reach a dumping
station. When connected to the sewer drain
line at a campground, keep the "black tank
drain" valve closed until the holding tank is at
least ¾ full. This should provide sufficient
water to assist in complete draining of the
black water holding tank. Repeat as needed.
Before using the RV or after dumping the grey
and black water holding tanks, always add the
proper amount of deodorant to the black water
tank to prevent malodors and help break down
holding tank contents (unless winterizing).
Follow the deodorant bottle or package
instructions. Driving to a disposal site will
normally loosen any accumulated waste
debris or solids from the sides of the holding
tanks.
46
H
ATER
OLDING
WARNING
Do not add automotive antifreeze or caustic
chemicals such as laundry detergents into
the holding tanks. Although these products
may have a deodorizing effect, they may
damage the plastic and rubber parts of the
plumbing system or the components.
Never leave the black tank drain in the open
position continuously when connected to the
campground sewer system.
B
& G
T
LACK
REY
There are labels on the exterior of the RV
indicating the location of the grey tank drain
and black tank drain (also called dump valves).
Always drain the black water holding tank first
so the following grey tank waste water can
help rinse any solids or debris from the dump
outlet and sewer hose.
Fig. 5.7 Black & Grey tank dump valves
1. To make drainage easier, level the RV.
2. Remove the sewer hose housing dust cap,
and attach the sewer hose (customer
supplied).
3. Place the end of the sewer hose into the
approved dump station.
4. Open the black tank dump valve (close the
dump valve when the black water holding
tank is emptied).
5. Open the grey tank dump valve (close the
dump valve when the grey holding tank is
emptied).
6. Remove, clean and store the sewer hose.
D
ANK
RAINS
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