Alma, They were right (up to a point). You just push and as you push,
turn slightly until it stops. Then TIGHTEN THE KNURLED DISK TIGHT.
Its what holds the tip on. One more important thing. Each time you
pick up the torch, check the disc to insure it is tight. Sometimes,
if you change a tip (or someone else uses the torch) the disc does
not get tightened down (or it loosens itself) and when you light the
torch, you get a big whoosh of gas (read - flame) right at the
That is why I tell my students never open the handle control valve
more than one full turn. Should, for some remote reason, you get the
whoosh, you need only turn the control valve one turn - off and the
flame will go away. One turn of that valve is full open anyway and
more then one turn gives you no more gas!!
Cheers and enjoy your new torch from Don in SOFL.