Volvo VNL Operator's Manual page 228

Cab Interior and Sleeper 223
Waste Water Tank
When the water is drained from the sink, it
is collected in a waste water tank behind
the fresh water tank. Waste water tank vol-
ume is 5 gallons (19 liters). The tank is
fastened to the floor with a strap that can
be easily opened for tank removal.
Before removing the waste water tank,
loosen the strap around the tank and un-
screw the drain hose from the inlet cap.
Carry the tank to an approved dump station
and empty by removing the inlet cap and
tilting the tank up to let the waste water
drain.
Flush the tank with fresh water. Replace
the inlet cap, strap the tank into the cab and
attach the drain hose.
W8002170