Rainer
Contributor
mike_s:Actually you can only "overfill" to the plus rating if it has the plus on it after hydro. At the second hydro, it might not pass the plus rating and only be rated for 2400psi (instead of 2640psi).
It *could* lose the plus rating, but it's not that likely...
mike_s:Some folks however pump up LP tanks to 3000psi or 3500psi, or even higher such as 4000psi. Pretty common in cave country. Now that's overfilling.
Yeah, and so what? If the tank has the + rating, then filling to that pressure leaves the tank as a 77cf. That's not over-filling.