O2ptima Manual –User Guide – Rev 1.2 Page 13 of 26
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2.4. Exhalation Side
The exhalation side comes over the divers’ right shoulder. It is comprised of 2 hoses
(black connectors), 1 T-Piece and 1 counter lung with appropriate fittings. All the
exhalation side threads are right handed threads and are black in color.
1. Attach the T-Piece to the exhalation lung. The T-Piece does not have a specific
orientation.
2. Attach the short breathing hose to the T-Piece and to the input side of the assembled
canister (see canister assembly instructions). This hose does not have a specific
flow direction.
3. Attach the long breathing hose to the front of the T-Piece.
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