A toilet is a sanitation fixture used primarily for the disposal of human urine and feces. They are often found in a small room referred to as a toilet, bathroom or lavatory. A toilet can be designed for people who prefer to sit (on a toilet pedestal) or for people who prefer to squat (over a squatting toilet). Flush toilets, which are common in many parts of the world (particularly in more affluent countries or regions), may be connected to a nearby septic tank or more commonly in urban areas via "large" (3–6 in or 7.6–15.2 cm) sewer pipe connected to a sewerage pipe system. The water and waste from many different sources is piped in large pipes to a more distant sewage treatment plant or wastewater treatment plant. Dry toilets, including pit latrines and composting toilets require no or little water with excreta being removed manually or composted in situ. Chemical toilets or mobile dry toilets can be used in mobile and many temporary situations where there is no access to sewerage. Some types of toilets are more commonly referred to as latrines, for example the "pit latrine", and for most people the term "toilet" has a cleaner more upmarket connotation than the word "latrine".