Originally Posted by kellysails
I have the same exact setup.
Wow, thanks Paul T, it never occurred to me that the valve was one way. My dink and motor have been sitting in the sun all week. I just sent my wife down to the boat to check the gas tank, damn. I should have thought about that.
The new epa-compliant tanks will hold pressure up to something between 5 and 7 PSI. They will swell visibly, but have been tested to hold this pressure. T
The pressure your wife saw might have seemed a lot, but may have been within the designed range. Still, it's not good practice to let the tank sit in the sun.
A vital part of the safety of these tanks is not over-filling them - they need some air space at the top of the tank.