4-26. Helmet Adapter Hose Maintenance.
This task covers:
Tool Kit, General Mechanic's (item 4, appx B)
Umbilical removed (para 4-25).
Disconnect helmet adapter hose from main air inlet port on the side valve.
Never connect the adapter hose to the emergency air supply
inlet. The emergency air supply valve does not incorporate a
one-way valve to protect the diver from barotrauma (squeeze) in
the event of loss of pressure in the umbilical.
Connect helmet adapter hose to the main air inlet port on the side valve. Install umbilical (para 4-25).