Any water inside? The pipe path starts at the fitting outside, goes through an anti-siphon valve (usually in a cabinet just inside), then down to the tank.
There's a bunch that you can's see but a leak anywhere could just be finding the fender as the exit.
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2019 Palomino Solaire 147X
2013 Ford F150
We just looked and it was some water under sink in bathroom. Fittings were loose. We tightened them hope this works. If it does not would the flush valve be bad?