But if the urinal is in a high-traffic commercial restroom and the clog returns every two weeks, you don't need a plunger—you need a plumber to descale the internal trap with a hydro-jet. Because once uric scale hardens into "urinal concrete," no amount of cranking will save it.

Before you grab a standard toilet auger and risk scratching the vitreous china (or splashing dirty water everywhere), understand this:

There are few plumbing emergencies that induce quite the same level of dread as a urinal that won’t drain. Whether it’s in a busy sports bar, a corporate office, or a basement workshop, a clogged urinal is a biohazard and a race against time.