I have just purchased (S/H)a set of alugas bottles and the associated pipes. The pigtails do not have the excess flow protection valves on them. When reading descriptions of the alugas bottles it says there is rupture protection in the gas take off valve. When looking at the valves this is not obvious to see and no sign of a reset button. Can anyone confirm that that there is rupture protection in the bottle valves so I do not need the excess flow protection pigtails.