I just had to replace one of those valves. They can not be tightened. I replaced mine with a plug. Only need to open it to winterize and de-winterize. The plug works fine and available at hardware or plumbing stores for a few bucks
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'03 41' Friendship & 24' trailer with HIS '03 H-D Heritage Springer, HER '15 H-D Freewheeler Trike, and '08 Smart Car.
"Adventure is found in the journey, not the destination."
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