Welcome to the forum!!
Are you sure your opening the fresh tank drain? Is it by itself or are there 2 drains next to each other?
The two next to each other are the low point drains and only empty out what’s in the fresh water system, but NOT the fresh tank. I have a feeling you have opened one of those. Look again for a single drain sticking out and try it. Other than that, if your POSITIVE you have the fresh tank drain open, then it might be clogged.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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