110
Black /Gray Tank Drains and Macerator System
Depending on your model, the gray tank drain and black tank drain (also referred to as dump
valves) may be located in the exterior utility center. These valves may have either an electric
switch control and/or a manual handle.
Always drain the black water holding tank rst so the following wastewater can help rinse
any solids or debris from the dump outlet and sewer hose.
On some models, the vent pipe may be part of the drainage system referred to as a “wet vent”
where water ows downward as air ows upward in
the same pipe.
Some models are equipped with a side vent system.
On these models this label will be next to the termi-
nation valve. This label should not be removed from
your recreation vehicle.
Dump the gray and black water holding tanks before traveling to avoid carrying unnecessary
weight. The weight of the holding tank contents is not calculated into the RV cargo carrying
capacity. Traveling with full holding tank(s) could 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 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 will provide sucient water to assist in complete draining of the black water holding
tank. Repeat as needed.
Before using the recreation vehicle, or after dumping the grey and black water holding tanks,
always add the proper amount of deodorant to the black water tank to prevent odors 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.
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 aect your tow
vehicle handling characteristics.
Never leave the black tank drain in the open position continuously when
connected to the campground sewer system. Leaving the drain open will
allow the liquid to drain out increasing the potential for a blockage in the
tank. Keeping the drain in the closed position will prevent debris from
accumulating in the tank.
Do not add automotive antifreeze or caustic chemicals, such as laundry
detergents, into the holding tanks. Although these products may have a
deodorizing eect, they may damage the plastic and rubber parts of the
plumbing system or the components
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