Should the toilet keep on running for more than a few minutes, flush again, and this time release the tension on the chain gently. (On a properly functioning toilet, you should be able to just let go, but older toilets may be in disrepair. )[5] X Research source

In some cases, dual flush toilets will have up-and-down levers instead of buttons. If this is the case, look for signs that tell you whether to pull the lever up or push it down (based on whether you have deposited liquids or solids). [7] X Research source

Dual flush toilets usually offer a . 8 gallon flush and a 1. 6 gallon flush. [9] X Research source