Re: Remote coil problem
correct and correct.
UFA = Universal Fill Adapter = the thing you screw onto the tank valve as a whole.
UFA knob = the gold knob you turn to depress the pin you are pointing to.
On other models, that pin goes in on the other side...under the UFA knob before you screw it in. That way it doesn't fall out when you remove the UFA from the bottle.