If a major leak occurs, water will quickly penetrate into the breathing circuit.

This can be heard as a bubbling sound during inhalation and exhalation, and perceived as increased breathing resistance.

Abort the dive and return to the surface.

Perform a by-pass continuously which provides fresh gas directly into the breathing hose.

Turn your body so that the left half of the IS-MIX comes up (inhalation side).

If there is a minor leak in the breathing circuit and/or an accumulation of a lot of condensation from a long or repeated dive, this may interfere and cause an increased breathing resistance and gurgling noise when inhaling and exhaling as a result.

This water can be drained from the circuit during the dive as follows:

1. Place your body at a 45º angle with your head highest.
2. Turn your body so that the left half of the IS-MIX comes up.
3. Shake the exhalation hose to drain water down to the canister housing.
4. Perform a by-pass and take a breath at the same time.
5. Hold your breath and lean your body forwards 45º while turning your body to the original position ensuring the water runs down into the bellows.
6. Perform a by-pass so the water is pressed out of the IS-MIX.
7. Perform a by-pass continuously, lean your body to the original position and simultaneously turn your body ensuring the left half of the IS-MIX comes up.
8. Take a gentle breath and feel that no water (splashes) enters when inhaling.
9. Check that the IS-MIX does not have a permanent leak and that any deposited water is satisfactorily drained .
10. Continue dive, if applicable.

Interspiro recommends aborting the dive at the slightest uncertainty!