On board air tank only

scuba air

Just as an aside.....
scuba tanks run anywhere from 1800 psi for an old k-valve tank from the 60's, to over 4000 psi for a new style stainless tank. To get one filled at a dive shop, you MUST have a certified diver card.
When I worked at the dive shop here in Malibu, we were very careful to be sure to keep all the tanks standing up in a rack, and to never bang the valves around. even 1800 psi will cut through your skin if you should get into the stream of escaping air when a break occurs. Also, a scuba regulator only drops the pressure from the tank pressure to ambient pressure. So, about 120 psi is about the limit for reduction, and refilling tires i would think would put some air in at quite a rapid rate. I have used my scuba tanks as supply while underwater for inflating lift bags, and for operating power tools, but that is open discharge.
BE CAREFUL with High Pressure air!!
 
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