Connecting tank to appliance via regulator and hose, all of my appliance have a fitting(male npt) that threads into the tank valve . New appliance has "acme" type connector "female". My old tank does not accept this connection type. My question is, When I buy a new tank, or exchange my old one, will the valve on the new tank support both connection types?
details please.
I have a mister heater and a grill. Both are new.
Do I need two different tanks? I was never aware of that? Is my heater connection obsolete? Does blue rhino have both types?
If it is obsolete, How can I run my heater when the old tank runs out?

NO they do not support both. However if you have an old style tank that is full so that you don't want to just waste it, there is an adaptor available. It screws into the old tank and has the new style (ACME) fitting for its outlet. Since it lacks the safety valve that new tanks need this setup will not let that old tank ever be refilled. It will, however, let it be used up so it is worth getting the adapter.