Sometimes, tiny construction hacks are the most satisfying. We had no running water in the fifth wheel (officially christened Ballena Blanca by Moana). Boiled down to one leaking valve on the plumbing system, and replacing this required getting a new 1/2″ PEX valve (or some combination equivalent). 3+ hardware stores here yielded 0 PEX things, so I brought the valve back from Seattle with me. Alas, my band clamp leaked near the point of the screw:(
Solution: 2 band clamps rotated ~180 degrees from each other. Boom!