When I do the pre dive test, I keep getting a 49 error. Why?

An error on test 49 in the pre dive check indicates that the breathing loop is leaking. In most cases, it is due to the OPV on the exhalation lung not being closed or a damaged/missing o-ring somewhere in the loop.

We recommend that prior to each dive, when putting your Poseidon MKVI together, all o-rings in the loop should be checked and lubricated.

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