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I have a question regarding the SPG's, why does the gauge go all the way to 5000 PSI? On a standard aluminum tank, that's 2000 more than you need. I have HP100's myself, so now it's 1500 more than needed.
Even with overfilling, it's still a large unused part of the dial going to waste.
A 4000 PSI gauge would be a better use of gauge face real estate. You'd have to be really inattentive to overfill the HP tanks to peg the needle.
I do know there are some very high pressure tanks though, but they are very rare.
They go to 300 bar (4351 psi). If you're going to use the same spg and just change the faceplate to create an imperial psi version, it's better scaling to mark the faceplate to an even 5000 instead of a 4350 or 4500. And it is not so uncommon for some fellows to pump up their tanks close to or around 300 bar. L6X® Hoop-wrap cylinder specifications - Luxfer: Setting The Standard WorldwideI have a question regarding the SPG's, why does the gauge go all the way to 5000 PSI?
I've had two of these plastic ones. The newer one was Tusa, and the other is branded something else (Suunto?) but they're evidently from the same manufacturer. I use these two on slinged deco/stage bottles. Never had a problem with the older Suunto one but the reg that was attached to the Tusa all of a sudden started acting weird.I went with the Single SPG and I decided buy the TUSA. Very nice and nothing to complain.
Tabata USA, Inc. - NEW : SCA-120 PLATINA PRESSURE GAUGE [SCA-120]
Tusa Platina Pressure Gauge @ Divers-Supply.com