Most likely, there is some debris in the fill valve, that is restricting the flow of water into your tank. The type of pipe you have, can contribute to this. Also, anytime a water main ruptures, anywhere upstream of your home, dirt, rocks,& debris can be pulled into the water mains, and get pushed along, and end up inside your pipes. Depending on the type fill valve, most are easy to disassemble, and remove the debris. Good luck to you, and Happy new year!
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