The black plastic drain fitting on back of unit is NOT threaded correctly for standard garden hose. This is an OEM/Supplier Quality Failure.
The thread profile (pitch, flanks, and crest) are incorrect, and the thread major diameter is incorrect (undersize), and therefore the garden hose (new) will NOT mate. See attached photos.
Please e-mail me for my mailing address, so that you can send me a correctly threaded drain hose fitting. Otherwise, I will return this Frigidaire unit to Best Buy and buy another dehumidifier from another OEM.
Images for this Question
(click to see full-size image)