Drainage and Sewer System
Your RV has a Drainage/Sewer system that operates much the
same way as the one in your home. How extensive the system
depends on your unit model and the options you obtained. It
includes a drain line from the kitchen sink and shower to a Gray
Water Holding Tank (may vary). There is also a marine toilet and
lavatory that empties into a separate Black Water Holding Tank.
Some models may have a second Gray Water Holding Tank to
accommodate various floorplans and features. Which tank each
sink drains into may vary from one model to another.
The drainage system also includes vents that carry odors caused
by drain water and waste out of the RV, while also equalizing air
pressure. Drain clean outs are provided to clean lines between
fixtures and holding tanks.
Drainage P-Traps
By code, all drains are equipped with P-traps to keep holding tank
odors from entering the vehicle. If you detect a foul odor, which you
believe is from your holding tanks, add water to all drains to ensure
that your P-traps water hasn’t evaporated from long term storage.
Places to add water include the Kitchen sink, Bathroom sink,
shower/tub, wet bar sink, and the washer/dryer drain.
Holding Tanks
The Gray Water Holding Tank(s) and Black Water Holding Tank
should be emptied frequently, or as indicated on the monitor panel.
The tanks should always be emptied at a special Dumping Station.
Most campgrounds and highway rest stops and many gasoline
stations are equipped with proper Dumping Stations.
NOTE: MOST STATES HAVE LAWS PROHIBITING EMPTYING
SEWAGE ANYWHERE BUT AN APPROVED DUMPING
STATION. THIS INCLUDES BOTH, GRAY AND BLACK WATER.
While camping, it is a normal practice to leave your Gray Water
Holding Tank valve open if your campsite is equipped with sewer
hook-up. NEVER leave the Black Water Tank valve open while
using the coach. Since the system utilizes gravity to empty, the
Black Water Tank will not drain properly unless is has sufficient
liquid to help drain out the solids. On some models the bath sink
drains into the black holding tank to assist with flushing. Some
models may also have the shower draining into the black holding
tank.
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