SpudFiles

There's supposed to be a "2" in front of it, just in case you haven't guessed already

so why do you need so many gauges if a 0 - 15 psi one will work from 1 to 20x?

I'm sorry, I guess I didn't realise that a 0-15psig gauge can measure pressures up to 300psig...

you need the 0-15psi one only for propane right? the others are only for measureing air?

not others.. other - and you are right on that