Toilet hose nut leaking

[Djy]

Hello! Toilet hose nut(thread) leaking for half year. If water supply hose disconnected, no leak from tank. If hose valve shut off no leak. It just leak from the thread. It is no matter hand or wrench tightening it still leak! I replaced hose 3 times. I replaced wash on the bottom of tank too. Tape or No tape on thread it leaks. How do I fix it? Thanks

 

[Reach4]

I wonder if that fill valve bottom got cross-threaded at some point. A new fill valve would fix that, if that is the problem.

 

[Sponsor]

 

[Mr tee]

The threaded shank of the fill valve could have a subtle crack that makes it look like the supply connection is leaking. A new fill valve would fix that.

 

[Djy]

Both Thanks. I will replace it.