The vent and fill must not have let the overflow out fast enough. Like you mentioned, I would guess if the tank shows no sign of leaking, you may not have damaged it. Also, when we are traveling, I only have the tank 1/3 full which give us enough water for day use until we get to a campground. No need for more water, more weight unless we boondock for a night or two.
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Former owner of 2015 Thor Vegas 24.1 in Ocala
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