Plumbing Questions? Ask a Plumber and Get Answers ASAP.
Hello my name is ***** ***** I look forward to helping you!
Try putting on a new 1/4 turn shutoff valve. Then have it face down in to a pan. With the shutoff turned off turn the water back on. Then with a new flex supply on the shutoff run water from the shutoff into a bucket. If you have good flow replace the fill valve with a Fluidmaster 400a
It's not uncommon to have debris work its way into the diaphragm and not allow it to fill.
Have you resolved your issue?