this post was submitted on 22 Jun 2023
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I guess using propane tanks for submarines is fairly common
https://images.app.goo.gl/jdS5fZ4JaTrgquHv5
http://www.psubs.org/museum/museum_sfphotos/den_03.jpg
http://www.psubs.org/museum/museum_sfphotos.html
Oh neat! I started looking at propane tanks, then switched to air compressor receivers when I found ones rated for 300 psi, knowing propane is generally 100-200 psi. But now I'm finding some propane tanks rated for 600+ psi...sooooo...guess it depends?