Huh?
Pressure relief valves only work to reduce thank pressure due to overfilling or excessive heat (fire).
Its normal mode is closed and if you have gas leaking from it is bad, other than that dont worry about it for 10-15 years. There is no way to look at one and say oh that's bad , you can look at the date code stamped on it and see how old it is but that is pretty much it.
I STRONGLY recommend you have any service done to you tank by a qualified LP dealer.
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Jim & Debbie England
Do you have Gas? 2015 F350 6.2L CCLB DRW 4.30 axle.
2020 Keystone Cougar 364BHL ,Gone 2012 Yellowstone Ridgeline 34RLT Fifth Wheel
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