I don't know your trailer. But, if the pump is not accessible from outside, it is probably behind a panel in one of your cabinets. The back panel in many cabinets are intended to be removable, may need to undo a couple of screws. I've also heard of them being under a bed. It will not be inside the sealed bottom.
Hopefully, someone with your model trailer will chime in with a location. Do you recall where you heard the pump when it was running?
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Al
I am starting to think, that I will never be old enough--------to know better.
Tolerance will reach such a level that intelligent people will be banned from thinking so as not to offend the imbeciles. Fyodor Mikhailovich Dostoevsky, Russian Novelist
S.E. Mich. Flagstaff 26FKWS / 2022 F-150 3.5 EcoBoost SCrew Propride
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