replacement of original propane tank

[Stu Jackson]

...the vent hose bending around the top of the regulator.  It does not vent the locker, but I guess is  some type of safety vent for the regulator.  ... help us out as to exactly what it does.
... I used a stainless thru hull vent and installed it in the cockpit.  Since CNG is lighter than air, it will not pool on the floor of the cockpit.

Bill,

That's exactly the idea.  The vent is there in case the regulator "lets go."  So instead of "dumping" into the compartment where the tank is located, the vent line moves the CNG outside.  What you've done is appropriate.

[Ken Juul]

I would also venture a guess that by turning the slotted head to line up with the port you can vent the pressurized line contents overboard.  Will keep the gas out of the boat when disconnecting the tank.

[crieders]

Very interesting. I don't have that dark colored "valve" on mine but the tank and the strap is the same. Perhaps someone can explain that to me. Thanks again for taking the time