Abstract: A removable waterless urinal cartridge for installation in a urinal to conduct urine to a waste line includes a collection basin for collecting urine, a drain opening in the collection basin; and a p-trap assembly having an inlet connected to the drain opening, a p-trap having a trap height of at least 2 inches, a generally transverse extension at the outlet of the p-trap, and a generally vertical tail depending from the generally transverse extension to an outlet. There is a strainer disposed over the drain opening in the collection basin having a top and a sidewall having openings for liquid to pass from basin through the strainer and into the drain. A float member is disposed in the strainer to block the drain opening when liquid is not present.