How dual-flush toilets | ehow, A dual-flush toilet is also referred to as a high-efficiency toilet. this type of toilet allows you to determine how big of a flush you need and how much water is. How install dual flush toilet | ehow, Know that concern over low flush toilets not working has been well addressed by the plumbing fixture industry, and some models can literally flush a potato, so dual. Howstuffworks " dual flush toilets work ", Dual flush toilets handle solid and liquid waste differently from the standard toilet. find out how dual flush toilets get rid of waste..