Tankless toilets draw on a high-pressure water supply to deliver forceful flushing for clearing bowl contents in a single flush. They work with a flush valve (flushometer) that's connected directly to a plumbing supply line. The high-pressure flush eliminates double flushing to reduce water use and minimizes the chance of clogs or backups to reduce maintenance. Compared to tank-style toilets, tankless toilets have a louder flush, but refill faster and leave a cleaner bowl after flushing. Sometimes called industrial or commercial toilets, they're used in high-traffic settings (more than 30 flushes per day) such as public and institutional restrooms.
Wall-Mount Tankless Toilet Bowls with Top Spud & Back Outlet