I'm not familiar with shark hose. Although, I have heard a trade name of sharkbite fittings... I do use push to connect fittings and poly hose at work but they dont like sustained vibration either, and a blown line can cost me.
I really like that hydraulic hose is rated for massive pressure compared to pneumatics. It's also cheap compare to purpose built flex hose for compressed air, by like pennies on the dollar comparatively.
Most Napa auto parts stores can make hose. Anyplace that sells tractor implements is another sure bet.
You can get it made with fittings which are NPT,National Pipe Thread.
I recommend male NPT on the tank or tank discharge valve connection and a Female NPT swivel in place of your copper connection.
If you heed the suggestion consider cutting your copper with enough to spare that you might reuse your unions or fittings in another location.
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