“This customer’s toilet was continuously running, and they thought it was an issue with the flapper,” he says as he starts the repair ... overflow tube for the flush valve was cut to ...

And even in their liquid-waste setting, dual-flush toilets save little water over a capable, single-flush toilet—and can use far more if they require a second flush to completely clear the bowl.

The basics of how a toilet works haven't changed much in the last 80+ years. After a flush, water fills the toilet tank, ...