Direct jump adapters from scuba yokes to 4,500 psi SCBA (CGA 347) breathing air packs are unsafe because the working pressure involved is beyond the point of yoke distortion and O-ring extrusion. Install #45015 (1/4" NPTF inlet) on your filler at the line valve to convert the whip to a 4,500 psi SCBA filler. Stainless handtite wheel with soft-seal nipple. (Order #45016 for replacement tip seal.)