2 outlets on the propane tank?

[Steve and Cindy]

I’m trying to figure out how to attach an external propane tank to the system. I know there’s kits for this but when I went to look at our tank I noticed there’s two outlets already there. Can I use the unused one to pipe propane into the tank from another tank or is that second outlet just an outlet and not an inlet?

 

[Steve and Cindy]

Could that second outlet be for attaching a BBQ or something?

 

[TheLooks]

IF you attach anything to it you must have a regulator. You can see the first one is going to a regulator and probably has a solenoid inline to shut the propane off with a switch. Check to see if it has a threaded connector.