In the past, urinals especially in heavily frequented motorway service areas or busy restaurants often had to be dismantled to remove residue from the flushing channels or to replace the siphon trap. Thanks to a revolutionary system this is not the case for lema. It can be reliably maintained with no need for dismantling. To do so, the siphon trap is removed from above. Easy access is thus gained to the water courses and residue can be effortlessly eliminated. This is an invaluable benefit especially in public sanitary areas where quick and easy cleaning is reflected in reduced costs.