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water and using a RV approved deodorizing agent, contents will dissolve
faster, keeping the drain lines and tanks clean and free flowing. These
chemicals are available at a RV supply store.
Two types of traps are used in drain systems for liquid/water.
1. Standard P-Traps, as seen under sinks, are most widely used
and must be winterized as per instructions.
2.
A straight 7” waterless trap is used in some outside kitchens and
other areas where the original P-traps will not fit. No
winterization is required. Ribs must be on the bottom side of the
trap.
Draining the Tanks
A final part of your sanitation system is the drainage of holding tanks.
Realizing dump stations will vary, place the coach as level as possible to
make drainage easier. Some tanks drain from the center requiring level
or slightly up in front. Others will drain from end permitting a slight tilting
to the side which drains are on.
Remove the cap and attach the adapter onto the valve housing. Turn the
adapter 10º to lock onto the pegs. Attach a flexible sewer hose to the
adapter and secure with a clamp. Place the other end into the approved
sewer system.
You may now open the 3 inch drain valve to drain the sewage tank first.
Open the valve on the gray water tank last to utilize water to wash and
rinse the hose and drain lines.
Most states and parks have strict laws and regulations to prohibit
dumping of wastes of any kind into anything other than proper disposal
facilities or sewer systems. Almost all privately owned parks have either
a central dump facility or offer a campsite hookup for sewage. You can
find lists of many dump facilities throughout the United States in
Woodall’s, Rand McNally Camp Guide, Good Sam Camp Guide, KOA
Kampgrounds Camp Guide,
or various other publications. Some fuel
stations also have dump stations.
Flush System (optional)
The flush system is designed and built to rinse the waste holding tank,
after waste tank has been drained completely of water and solids.
1. Attach a fresh water source
to the connection marked “Sewer
tank Flusher”. Be sure termination valves are open on tanks.
2. Open valve to release water into tank for rinsing and cleaning of
your waste water holding tank.
3. Rinse for several minutes to remove any foreign matter from
tank and probes.
Remember the moisture content may give you a false reading on your
