This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+1F6BE offers a line break opportunity at its position, except in some numeric contexts.
The CLDR project calls this character “water closet” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: bathroom, closet, lavatory, restroom, toilet, water, WC.
This character is designated as an emoji. It will be rendered as colorful emoji on conforming platforms. To reduce it to a monochrome character, you can combine it with Variation Selector-15: 🚾︎ See the Emojipedia for more details on this character’s emoji properties.
The Wikipedia has the following information about this codepoint:
A flush toilet (also known as a flushing toilet, water closet (WC); see also toilet names) is a toilet that disposes of human waste (principally urine and feces) by using the force of water to channel it through a drainpipe to another location for treatment, either nearby or at a communal facility. Flush toilets can be designed for sitting or squatting, in the case of squat toilets. Most modern sewage treatment systems are also designed to process specially designed toilet paper. The opposite of a flush toilet is a dry toilet, which uses no water for flushing.
Flush toilets are a type of plumbing fixture and usually incorporate an S-, U-, J-, or P-shaped bend called a trap that causes water to collect in the toilet bowl to hold the waste and act as a seal against noxious sewer gases. Most flush toilets are connected to a sewerage system that conveys wastewater to a sewage treatment plant; alternatively, a septic tank or composting system may be used.
Associated devices are urinals, which primarily dispose of urine, and bidets, which use water to cleanse the anus, perineum, and genitals after using the toilet.