WATER SYSTEMS
83THOR MOTOR COACH | MADE TO FIT
9
14. Continue ushing the system, allowing the water to ow for several minutes.
15. Close the fresh water tank drain valve and the faucets. Rell the system with potable
(drinking) water.
Waste Water System
Depending on your motorhome model year, make, and model, the water and debris from the
sinks and shower (or tub) ow into the gray water (or waste water) holding tank. Water and
debris from the toilet ow into the black water (or sewage) holding tank. Some brands and
models may also have the lavatory, shower, or tub draining into the black water (waste water)
holding tank.
Drain Pipes
Drain pipes have P-traps and/or waterless traps (HEPVOs) installed to help prevent drain
odors from escaping into the motorhome. During travel, water within P-traps may displace
and permit odors into the motorhome. Drain-related odors come from decomposing
materials in the holding tank. If odors are detected, place a few cups of water down each drain
and use a RV approved deodorizing agent, which will reduce drain odors and help keep the
drain lines and tanks clean and free owing. Drain chemicals are available at RV supply stores.
Vents
Vent pipes and vents release air from the grey and black water holding tanks. e exterior
vent cap is attached to the roof, and must be kept clear of debris and obstructions to perform
as intended. On some brands and models, the vent pipe may be part of the drainage system
referred to as a “wet vent” (water ows downward as air ows upward in the same pipe).
Emptying the Holding Tanks
1. Remove the cap from the sewer drain and connect your exible sewer drain line.
2. Attach the other end of the exible sewer drain line to the dump station inlet. Be sure both
ends of the exible sewer drain line are securely attached.
Typical HEPVO valve label (if so equipped)
Typical termination valves
Remove the waterless trap before
using mechanical drain-rooting
devices. Otherwise, the waterless
trap can be damaged.
NOTICE
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