The Korky Fill Valve will adjust to a wide variety of toilet tanks. The key thing is to find the critical level line and adjust this about an inch above the flush valve. There is also a line that shows the water lever. This should be just under the top of the fill valve. Check out more home improvement tips in our e-books https://www.amazon.com/gp/product/B0B2KW1FQ9?notRedirectToSDP=1&.