The waste water system in the motorhome can be described as two separate systems. A gray
water system that consist of the drain lines and holding tank for waste water from the sink
and tub, and a black water system which includes the holding tank and drain for toilet waste.
In some cases the bathroom lavatory may drain into the black tank. Each system is self
contained, and allows disposal of waste at designated dump stations at your convenience.
Components of the gray water system have drain traps, and both tanks are vented to
equalize air pressure and disperse odors caused by drain water and wastes outside.
Sometimes, the rocking movement of the motorhome while driving may empty the drain traps
of their water, and allow the odors of the gray water tank to come into the coach. Residue in
the drain water lines can also produce odors. To combat gray water holding tank odors, an
approved deodorizing agent should be used. An agent that dissolves grease and fats and
contains a detergent will help keep tank drain lines clean and free-flowing.
HOLDING TANKS
Both holding tanks are located under the bathroom area. The drain valves are located in the
systems compartment on the driver side of the motorhome.
Each tank has a separate drain line and dump valve, which permits dumping tanks
individually or together. Each tank should be emptied often at a dump station designated for
this purpose. Most national, state, and private campgrounds have dumping facilities. Many
have hookups on the campsite, while some have portable dump collectors. Many service
stations, particularly along interstate highways, also have these facilities. Many campground
directories list dumping station locations across the nation.
If possible, dump holding tanks before a trip, to reduce the gross weight of the vehicle.
Enough water should be kept in the black water tank to cover the bottom, to prevent
hardening of any residue that may remain.
Do not dump black water tank until it reaches ¾ full. This practice makes sure that enough
water is in the tank to flush all waste into sewer lines. If necessary, fill tank to the ¾ mark with
additional water before draining.
Never put anything into the holding tanks other than normal drain water, waste, and
biodegradable products. Paper wrappers, gum, cigarettes, etc., no matter how small they
might be, should never be placed into either the gray or black tanks.
NOTE: It is important to note that harmful and toxic materials can accumulate if the
holding tanks are not regularly drained and thoroughly rinsed. It is also important to
use holding tank deodorizing and cleaning agents in the waste water tanks to reduce
odors and keep the lines open and free-flowing.
NOTE: Always remember to clean up the dumpsite before leaving. NEVER empty your
holding tanks directly on the ground, a roadway, river or stream. DO NOT POLLUTE.
8-4
WATER SYSTEMS
2005 PRESIDIO
WASTE WATER SYSTEM
Summary of Contents for 2006 Presidio
Page 1: ...2005 PRESIDIO 08 2005 Revision 1...
Page 2: ...2005 PRESIDIO...
Page 4: ...2005 PRESIDIO...
Page 6: ...2005 PRESIDIO...
Page 7: ...2005 PRESIDIO...
Page 8: ...2005 PRESIDIO...
Page 12: ...TABLE OF CONTENTS 2005 PRESIDIO...
Page 22: ...X 2005 PRESIDIO INTRODUCTION...
Page 36: ...1 14 IDENTIFICATION SAFETY 2005 PRESIDIO...
Page 62: ...3 12 DASH CONTROLS INSTRUMENT PANELS 2005 PRESIDIO...
Page 96: ...7 14 ELECTRICAL SYSTEMS 2005 PRESIDIO...
Page 116: ...9 10 LP GAS SYSTEMS 2005 PRESIDIO...