manufacturer’s owner’s manual supplied with the toilet for
proper use, maintenance, and chemical usage. The toilet paper
dispenser is mounted inside the lavvy door under the sink.
Information on the toilet plumbing can be found in the “Waste
System” section.
Holding Tanks
The holding tanks terminate in a valve arrangement that
permits each tank to be dumped separately or together. The
valves are called “knife valves”. A blade closes the opening in
the sewer drain pipes. The blade is connected to an extension
handle that is pulled to release the contents of the tanks(s).
During self-containment use, the sewer outlet line should be
securely capped and valves closed to prevent leakage of waste
material on the ground or pavement.
Holding tanks are enclosed sewer systems and as such must be
drained into an approved dump station. Both black and gray
water holding tanks must be drained and thoroughly rinsed to
prevent accumulation of harmful or toxic materials.
Dump the holding tanks only when they are about 2/3 full. If
necessary, fill the tanks with water to 2/3 full.
This provides sufficient water to ensure complete flushing of
waste material into the sewer line. Whenever possible, dump
the holding tanks before traveling.
The holding tanks outlet is set up to be used with a removable
fitting that locks onto the outlet with clockwise twist. The
sewer drain hose is clamped on this fitting when you need to
drain the holding tanks. When you are operating self-
contained, or you store the camper, install the protective cap in
place of the removable hose.
The sewer (dump) hose is compressed and stored in the
camper’s hose carrier.
When you want to drain the holding tanks:
1) Attach the sewer hose to the dump outlet.
2) Extend the hose and insert the hose end into the
sewer or dump station inlet, pushing it firmly into the
opening to be secure. In some cases, adapters may be
necessary between the hose and inlet.
3) Arrange the sewer hose so it slopes evenly and is
supported to maintain the slope.
4) Dump the black water holding tank first. Grasp the
handle of the black water knife valve firmly and slide
the valve open with a steady pull.
5) Allow enough time for the tank to drain completely.
Rinse and flush the tank and drain hose through the
toilet with a bucket of water or a hose.
6) When the tank flow stops, push the handle in to close
the valve.
7) Pull the handle for the grey water holding tank.
Repeat steps 4 through 6. This tank is dumped last to
aid in flushing the drain hose.
8) Remove the sewer hose and replace the outlet cap.
9) Rinse out the sewer hose with fresh water and
remove the sewer hose from the dump station.
10) Replace sewer or dump station cover(s).
11) Store the sewer hose.
NOTE: To facilitate draining, the camper should be slightly
higher in the front. Also, raise the passenger side of the
camper to allow drainage toward drains located on the driver’s
side.
If you are parked at a site with a sewer hookup, keep the black
water knife valve closed to allow the waste level to build up.
The outlet will probably clog if you leave the knife valve open
continually. Run enough water into the tank to cover the
bottom. This will aid the breakup of solid wastes. The gray
water tank valve may be left open.
Holding Tank Care/Maintenance
Since holding tanks don’t rely on any sophisticated
mechanical devices for their operation, they are virtually
trouble-free. The most common problem is also an unpleasant
one, clogging. You can minimize chances of clogging by
keeping the following considerations in mind:
Keep the black water tank drain valve closed. Be sure
to cover the tank bottom with water after dumping.
Movement while driving will help to liquefy the
solids.
Use only toilet tissue formulated for use in septic
tank or RV sanitation systems.
Keep both drain valves closed and locked, and the
drain cap tightly in place when using the system on
the road.
Use only cleaners that are approved for use in septic
tank or RV sanitation systems.
Use a special holding tank deodorant chemical
approved for septic tank systems in the black and
grey water holding tanks. These chemicals aid the
breakdown of waste and make the system much more
pleasant to use.
Do not put facial tissue, paper, grease, ethylene
glycol-based or other automotive antifreeze, sanitary
napkins, or household toilet cleaners in the holding
tanks.
Do not put anything solid in either tank that could
scratch or puncture the tank.
If the drain system does get clogged:
Use a hand-operated probe to loosen stubborn
accumulations.
Seriously clogged P-traps may require disassembly.
Be careful not to over tighten when reassembling.
Do not use harsh household drain cleaners. Do not use
motorized drain augers.
Sometimes the holding tank valve will get clogged. In this
case, a hand-operated auger may be necessary. Be ready to
close the valve quickly once the clog is cleared. If the seal gets
damaged, it must be replaced.
Do not use the same hose you use for filling the potable water
tank or for the connection to the city water inlet. Use a
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