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7-7
SECTION 7 –
PLUMBING
appropriate waste water disposal site. This means
you can use the toilet, sinks, and shower even in
areas where utility hookups are not available.
The black water holding tank contains the
sewage from the toilet and may include bathroom
lavatory on some models. The gray water holding
tank contains the waste water from the galley
sink and shower, and may include bathroom
lavatory.
See “Specifications” in
Section 1 -
Introduction
for tank capacities for your model.
Dumping Holding Tanks
1. Remove sewage drain hose from water
service center.
2. Remove dust cap from sewage drain outlet
and connect sewage drain hose. Be sure it is
firmly attached.
NOTE: The sewage drain outlet swivels
downward (on certain models) when
necessary to avoid bends in the sewage
drain hose, which could trap solids while
dumping, or to provide more direct
drainage while using on-site sewer hook-
ups.
3. Place the outlet end of sewage drain hose into
disposal opening.
NOTE: Black and Gray waste tank drain valve
positions may be reversed, depending on
floorplan and tank location.
4. Open the Black Waste Tank Drain Valve with
a quick pull and make sure there are no sags in
the hose. Move the hose gently about to
dislodge any waste and ensure complete
drainage. Close Black Waste Tank Drain
Valve as soon as tank is empty.
NOTE: DO NOT OPEN BOTH VALVES AT
ONCE. Do not open the gray waste tank
drain valve until the black tank is
drained and black waste tank drain valve
closed to avoid sewage back-up into gray
tank. Gray water also rinses any black
water solids from the sewage drain hose.
5. Open the Gray Waste Tank Drain Valve. Be
sure there are no sags in the hose to ensure
complete drainage. Close Gray Waste Tank
Drain Valve as soon as tank is empty.
6. Add an odor control chemical to the sewage
holding tank through the toilet. These
chemicals are available at most RV supply
centers.
7. Rinse sewage drain hose thoroughly with
water before stowing.
NOTE: We recommend that you dump all
holding tanks before traveling to avoid
carrying unnecessary weight.
Holding Tank Drain Valves
(Located in holding tank compartment)
-Typical View
Gray Waste Tank
Drain Valve
Black Waste Tank
Drain Valve
Sewage Drain Outlet/
Dust Cap
• 1st - Pull
Black Waste
Tank Drain
Valve to drain
Black Water
(sewage)
Tank, then
close.
• 2nd - Pull Gray
Waste Tank Drain
Valve to drain Gray
Water (sink/shower)
Tank, then close.