You need to adjust the float. Or, you can buy the complete inexpensive float valve assembly at Lowes or Home Depot and can install it in less than 5 minutes. Turn off the water supply, drain the tank, sop up the remaining water in the tank or put a pan under the tank opening for the next step, remove the valve assembly and float and install the new valve assembly with the float included. Turn on the water supply and set the water level adjustment valve to about 1/4 inch below the stand pipe overflow drain. This is done by the float assembly. Turn on the water supply. This completes the change-out.
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You need to adjust the float. Or, you can buy the complete inexpensive float valve assembly at Lowes or Home Depot and can install it in less than 5 minutes. Turn off the water supply, drain the tank, sop up the remaining water in the tank or put a pan under the tank opening for the next step, remove the valve assembly and float and install the new valve assembly with the float included. Turn on the water supply and set the water level adjustment valve to about 1/4 inch below the stand pipe overflow drain. This is done by the float assembly. Turn on the water supply. This completes the change-out.