25627 M16 Offset Extension Vacuum Valve II
This is a one way vacuum valve, which uses the included hand pump to create a vacuum and activate the housing electronics, including the Vacuum Check light. These Vacuum Valves contain an integrated vacuum release, and a redundant waterproof cap. No tools are required to open the housing after creating a vacuum, as the vacuum is released with a simple knurled nut.
You must have the electronic circuitry installed in your housing for this system to work. The M16 size fits most DSLRs and video housings.
"Offset" Extension Valves are used when a housing has a single accessory hole, but requires both a Vacuum Valve and electrical bulkhead to be installed in the same location. This will enable most housings to be able to utilize this valuable tool.
The valve uses a hand pump to create the vacuum.
All vacuum valves also include a hand pump and spanner tool for installing valves.
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