JAYCO TOWABLE SECTION 8 - PLUMBING SYSTEMS
8-13
A label has been placed near the location of the waste valve that reads as follows:
REMOVE WATERLESS TRAP BEFORE
USING MECHANICAL DRAIN-CLEANING DEVICES.
Vents
Another important part of this system is the vent pipes and vents that release air
from the grey and black water holding tanks. The exterior vent cap is attached to
the roof and must be kept clear of obstructions to perform as intended. On some
models, the vent pipe may be part of the drainage system referred to as a "wet
vent" (water flows downward as air flows upward in the same pipe).
BLACK/GREY WATER HOLDING TANKS
When connected to the sewer drain line at a campground, keep the “black tank
drain” valve closed until the holding tank is at least ¾ full. This should provide
sufficient water to assist in complete draining of the black water holding tank.
Repeat as needed.
Never leave the black tank drain in the open position continuously when
connected to the campground sewer system.
BLACK & GREY TANK DRAINS
There are labels on the exterior of the RV indicating the location of the grey tank
drain and black tank drain (also called dump valves). Always drain the black water
holding tank first so the following grey tank waste water can help rinse any solids
or debris from the dump outlet and sewer hose.
1. To make drainage easier, level the RV.
2. Remove the sewer hose housing dust cap,
and attach the sewer hose (customer
supplied).
3. Place the end of the sewer hose into the
approved dump station.
4. Open the black tank dump valve (close the dump valve when the black water
holding tank is emptied).
5. Open the grey tank dump valve (close the dump valve when the grey holding
tank is emptied).
6. Remove, clean and store the sewer hose.
7. Close the sewer hose housing dust cap.
You can locate many dump stations throughout the United States and Canada in
Woodall’s, Rand McNally Camp Guide, Good Sam Camp Guide, KOA
Kampgrounds Camp Guide and various other publications. Some fuel stations
also have dump stations.
Please contact your RV dealer for assistance in the purchase and installation of a
sewer hose or sewer hose extension (if needed).
Fig 8.8 Black/Grey tank dump
valves
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