No camera should dive unprotected from human error. Most camera housing floods are preventable with good assembly technique, but even the most experienced shooter can get in a rush and make a fatal error. The AirLock vacuum verification system will verify your housing is leak-proof before you jump in the water.
AirLock is the best vacuum system on the market:
Impact resilient stainless / aluminum construction
Deepest rated valve design to minimize human error
Low cost adapters allow one Airlock for many housings
Lowest profile right angle design for minimum snags
360 degree valve rotation for easy access in tight spaces