The H2Zero waterless urinal from Caroma utilizes breakthrough technology to use zero water for optimum performance and water conservation. The H2Zero’s unique patented cartridge technology does not use an oil-based seal, as traditionally used in waterless urinals. Within the cartridge is a Bio Fresh deodorizing block that is activated during use. The Bio Seal™ allows urine to pass through the seal freely, eliminating unnecessary waste build-up within the cartridge. The Bio Seal, which lasts up to 10,000 uses, also acts as a one-way airtight valve to seal the cartridge from the drainage system.