This is the 1/2 through hull for the other end of the VBT high pressure air inlet. I am putting a straight BSP thread (14 tpi) onto the pipe to accept the other swagelok fitting. The other end has the BSP taper thread to accept the 1/2 ball valve. I always forget my camera when I am here, so again its a bit of a rubbish phone camera picture.

Submersible Build Log