NOTE: Most chemical mixtures for holding tank odor con-
trol are poisonous. Follow the product manufacturer’s
directions and warnings when using any holding tank
additive.
Sinks, shower and clothes washer drains incorporate a water trap or
“P-trap” and auto vents to prevent waste water holding tank odor from
entering the motorhome. These P-traps for the most part are usually
within 54” of a vent tee. These traps must have water in them to block
odors. During storage water can evaporate and allow odor into
motorhome. If odor is detected run water into sinks, shower and
clothes washer to fill drain traps. The auto vent by design is to assist in
the flow of water in the drain lines. They enable a smooth flow of
water in the drain without creating a vacuum.
The auto vent, if stuck in the open position, can allow grey odors to
enter the motorhome. These auto vents also double as “clean outs” in
the event you have to snake out a line.
NOTE: Most chemical mixtures for holding tank
odor control are poisonous. Follow the product man-
ufacturer's directions and warnings when using any
holding tank additive.
When parked in an area with a sewer hook up, “exercise” the drain pipe
before hooking up the sewer hose. Swivel the pipe up and down by firmly
grasping both sides of the sewer drain pipe hose connection. This will exer-
cise the O-rings. Leave the drain pipe pointing up to prevent any residual
material from running out.
Attaching the Sewer Hose:
• Turn the drain end cap counterclockwise and remove it from
the drain pipe.
• Unscrew the hose access deck plate from the bottom of the
water service compartment. Feed the adapter end of the drain
hose up through the hole and install the hose adapter onto the
drain pipe.
• Rotate the drain pipe downward for maximum flow.
• Straighten and secure hose to avoid recoil. Attach the end of
the hose to the sewer connection at the dump station.
NOTE: Ensure sewer hose connections and hose clamps are secure
before use.
Water Systems
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WINDSOR 6•169
Draining the
Waste Holding
Tanks
Drain Traps &
Auto Vents
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