GMC Royale - Drainage and Sewer System

pan with non-abrasive cleaner . Stainless steel cleane
r
may be purchased at most grocery stores
. AB S
cleaner, such as Aqua K-7, may be purchased fro
m
your GMC dealer .
LEAK S
Traveling over bumpy or rough roads can caus
e
pipe fittings to loosen
; check pipe fittings regularl y
for signs of leakage .
DRAINAGE/SEWER SYSTE
M
GENERA L
Your motor home will have a Drainage/Sewe r
system which functions much the same as the on
e
in your home
. It includes drain lines from the kitche n
sinks, lavatory, and tub/shower to the gray wate r
holding tank and a marine-type toilet which emptie s
directly into a separate waste holding tank . Th e
drainage system also includes vents which carry odor s
(caused by drain water and waste) out through th
e
roof, while equalizing air pressure
. The latter i s
necessary to maintain a water barrier against odor s
in the "P" traps and to ensure smooth flow an d
escape for your drainage system .
DRAIN CAR E
Use clear water to clean exterior pipe surfaces .
DO NOT use harsh drain cleaner chemicals or solvent s
in drains . Drain cleanouts are installed at interval s
to facilitate drain line cleaning or unclogging . Us e
a wrench to remove and replace drain cleanout plug
.
TOILET
Jimmy installs either a Galaxy or Starlite mode l
Aqua Magic marine toilet
. Each model has tw o
pedals near the front base for flushing and addin g
water
. To operate the toilet, step on the small peda l
to add water to the bowl . When the desired amoun
t
has entered, release the pedal slowly . To flush, ste p
on the large pedal until water swirls, then releas e
pedal slowly
. Before initial use and after emptyin g
the holding tank, flush the toilet . When the bow l
is filled, pour in 8 ounces of Aqua-Kem concentrate,
then flush the toilet again. This will help to contro l
odors .
CARE OF TOILET — Use Aqua Bowl Cleane r
as directed . DO NOT use highly-concentrated o r
high-acid household cleaners (NO SCOURIN G
POWDER) to clean the bowl . If the slid e
valve does not move freely, apply silicone spray .
HOLDING TANK S
A gray water holding tank is for kitchen sink ,
tub/shower and lavatory water ; a waste holding tan k
is for the marine toilet . Each should be emptie d
frequently, always in a specified dumping station .
Most campgrounds are equipped with dumpin g
stations, often at each campsite
; many service station s
also have waste dumping stations
. Avoid having t
o
empty tanks too often by using restroom facilitie s
when available. You can prevent unnecessary accum-
ulation of solids in the waste holding tank by no t
putting facial tissues or similar items into the toilet .
EMPTYING HOLDING TANKS — Be certai n
your vehicle is level since emptying of holding tank s
depends on gravity . Remove the sewage drain hos e
from its storage container (Figure 8) . Remove the ca p
from the termination outlet (Figure 9) and connec t
the sewage drain hose . If you leave the drain hos e
connected to the termination outlet when yo u
are camped, DO NOT open the termination valv e
until you want to empty the holding tank. Th e
system is not like your plumbing at home wher
e
waste is flushed directly into the sewer system .
Instead, if the valve is left open only liquid wast
e
may drain out, causing solids to collect and harde n
in the bottom of the holding tank .
To drain either holding tank, pull out the dum p
valve slide handle (Figure 9) . You can empty th e
left-hand holding tank by opening only the dum p
valve handle on the left . To empty the right-han d
holding tank, both dump valve handles must b
e
open
. Flush or pour about two gallons of wate r
through the toilet when emptying the waste holdin g
tank and drain again
. This flushes the tank an d
helps clean the drain hose . Repeat as necessary .
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