<P> A typical flush toilet is a ceramic bowl ( pan ) connected on the `` up '' side to a cistern ( tank ) that enables rapid filling with water , and on the `` down '' side to a drain pipe that removes the effluent . When a toilet is flushed , the sewage should flow into a septic tank or into a system connected to a sewage treatment plant . However , in many developing countries , this treatment step does not take place . </P>
<P> A typical flush toilet is a ceramic bowl ( pan ) connected on the `` up '' side to a cistern ( tank ) that enables rapid filling with water , and on the `` down '' side to a drain pipe that removes the effluent . When a toilet is flushed , the sewage should flow into a septic tank or into a system connected to a sewage treatment plant . However , in many developing countries , this treatment step does not take place . </P>
what the back part of the toilet called
what the back part of the toilet called
cistern ( tank )
cistern ( tank )