I recently changed oxygen suppliers and got a new regulator for my M6 tank. It is a pulse one and seems to be shooting out more than my other one did. I only use 2 lpm and notice that it makes a noice and more air comes out than my other regularor. My question is has anyone had this problem and is there that big differnece in bradnd of regulators? How can I tell if it is only pushing out how much I need? Any help appreciated.