Apeks Regulator Owner's Manual page 26

cap is securely sealed over the inlet, and the second stage purge
buttons are not depressed while the regulator is submerged or
wet.
NOTE: When soaking or rinsing an adjustable model regulator
unpressurized, check to ensure that the second stage inhalation
control knob is turned completely "in" (clockwise) to prevent
moisture from entering the valve and LP hose.
CAUTION: DO NOT loosen the first stage yoke screw, depress
the second stage purge button, or turn out the inhalation
control knob (if present) if the regulator is submerged
unpressurized. Doing so will allow the entrance of moisture,
and will require that the regulator be returned to an
authorized dealer for service.
4. While the regulator is soaking, move the IVS control switch (if
present) back and forth several times from the "MIN" to the "MAX"
settings. You may also turn the inhalation control knob slightly
back and forth—no more than 4 turns. This action will help to
loosen any salt or mineral deposits that may remain lodged in the
second stage.
5. After the regulator has been properly soaked, it is important to
rinse it vigorously by flushing the first stage ambient chamber
(non-environmentally sealed models only), the second stage
mouthpiece, and the openings in the second stage front cover with
a pressurized stream of water. This will remove any deposits of
salt and minerals that were loosened during soaking. If the
regulator is not pressurized, do not press the purge button
underwater. Moisture may otherwise enter the valves, which will
require that the regulator be returned to an authorized dealer for
service.
6. Wipe the regulator as dry as possible and hang by the first stage
to ensure that all remaining moisture drains from the second
stages.
7. Adjustable models should be stored with the inhalation control
knob turned all the way out (counter-clockwise), away from the
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