Funny Toilet

How toilet cisterns (tanks) work
Cisterns are either lever or push button operated. Cisterns operated by a push button are available in single (6L) or dual flush (3L/6L) depending on the range. The majority of cisterns are now internal overflow; this means in the event of a failure, the water will be contained within the unit. A flushing trough is an apparatus which serves several WC pans from one long cistern body. It is designed in this way to allow more frequent flushing. These can be found in schools, colleges, and public toilets, although they are becoming less common.