6 • 261
Water Systems
2004 • LaPalma
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 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.
If the auto vent is stuck in the open position, grey odors may enter the
motorhome. Auto vents double as "clean outs" in case the line has to be
“snaked” out.
NOTE: Most chemical mixtures for holding tank odor
control are poisonous. Follow the product manufacturer's
directions and warnings when using any holding tank
additive.
NOTE: During cold weather antifreeze must be added to
the drain traps.
Drain Traps & Auto
Vents
OM070152
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