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Do they refill with air? Or do you need concentrated oxygen or something?
by Aeolun 9mo ago
Do they refill with air? Or do you need concentrated oxygen or something?
- PaulDavisThe1st 9mo agoThey are refilled with air at 4000 PSI. The bottles are heavy and large, so you cannot effectively carry around a spare.
- dghlsakjg 9mo agoJust air. Very similar to a scuba tank, but typically composite instead of aluminum. You wouldn’t want to be breathing anything enriched with oxygen in a fire.