User manual
Poseidon MKVI User Manual
Chapter 1
Page 29
Inspect the upstream CC checkvalve. It should be free of debris and should lie smooth and
uniformly at against its removable carrier plate. If there is any curling, cuts, gouges or other
damage to the checkvalve, remove the carrier plate and replace the checkvalve only with a
Poseidon original manufacture mouthpiece checkvalve. Attach the left front breathing hose to
the upstream CC port as shown in Figure 1-45, following the standard hose connection pro-
cedures previously described. The breathing loop assembly is now complete.
The result should now appear as shown in Figure 1-44.
WARNING:
Carefully inspect all breathing-hose o-rings when assembling the
breathing loop, and ensure that the ttings themselves are properly
attached to the hoses. Sometimes the ttings can become loose
and form an imperfect seal. Careless assembly can lead to poor
seals, and increase the risk of water entering the breathing loop
during a dive.
WARNING:
The hoses are designed to function properly in all normal diving
environments. However, if the hoses are exposed to temperatures
in excess of 70°C / 158° F, they may become permanently
deformed, and would need to be replaced.
IMPORTANT:
The left and right checkvalves and their carrier plates in the
mouthpiece are identical to each other. However, because of the
way they are designed, they will only t into each port on the bottom
of the mouthpiece in the correct orientation. If inserted the wrong
way, they will not t properly, and the hose connections will not t
into the ports. If you have trouble inserting the hose ttings into
the moutpiece CC connection ports, ensure that the checkvalves
are inserted properly and in the correct orientation. Also, although
it is technically possible to assemble the mouthpiece up-side-
down, this will be immediately obvious when the gas supply hose
to the integrated regulator comes from the wrong side, and the
breathing hoses obstruct your mask. If the breathing hoses block
your view when holding the mouthpiece in your mouth, then the
mouthpiece may have been installed up-side down. It is actually
not dangerous to dive this way, but you will appear quite foolish.
DANGER:
Ensure that the checkvalves are inserted properly and in the
correct orientation.