LS1/LS2 Manual
8
Vent Plug
This plug is only to be used if there is a leak in the housing.
A leak in the housing can be dangerous because the housing will pressurize
internally to the same pressure as the depth of deployment.
If there is a leak, it is critical to relieve the pressure before removing the lid,
otherwise the lid could fly off.
The vent plug can be used to relieve the pressure, by turning it slowly until you
start hearing air come out. Once air starts coming out, stop unscrewing and wait
until air stops coming out. The vent plug is designed to stay in the endcap and
safely vent air through holes machined in the plug.
Once the internal pressure has equalized, you may remove the top lid with the
hydrophone. There is no need to fully remove the vent plug. Then gently
retighten the vent plug. On PVC housings be very careful not to overtighten the
plug, otherwise the threads in the bottom endcap may strip.