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Please note that the coin dump valve also functions as an over pressure relief
valve so that in the event you have a lot of gas in the Backup wing and start
to ascend it will vent automatically to prevent a wing rupture.
For this reason if the Backup wing is very full and you put any pressure on it
the coin dump valve will release a small amount of air without you touching it.
This is a design feature and perfectly normal.
After diving both the Primary and Backup wings should be drained of any
water that is inside and partially inflated to dry.
Both Primary and Backup wings can be drained of water in exactly the same
way air is vented from them although it is easier if you orally inflate them a
little first so that you can force any water out under pressure.
Please note that even when not using the Backup wing during a dive a small
amount of water may enter it by being forced through the coin dump valve
under pressure as you descend as any small internal airspace remaining
inside the backup wing is not equalized with external pressure.
This is completely normal and will not affect the function of the wing in any
way but will need to be drained at the end of the dive.
Step 6: Correct Use of the BAT Wing
2 Rigging the Razor BAT Wing
