Chapter 6: Sinks

The wastewater from most sinks is classified as gray water, however, the wastewater from sinks containing organic or hazardous contaminants, such as kitchen and laboratory sinks, is classified as black water.

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Most lavatories have an integral overflow physically embedded in the fixture body.

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Lavatories are categorized by the building occupant use, their shape, size, and color, whether they have any special integral features, and by method of installation.

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The back of a wall-mount lavatory typically includes four large screws with which it can be secured to the wall.

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Wall-mount lavatory supports for public use must meet ASME A112.9.6R.

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A metering faucet is a faucet equipped with a proximity sensor and a mechanism that opens its valve to allow water to flow in response to the presence of a hand or hands in close proximity.

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All sinks drain by siphonic action to the drainage system through an external P-trap connected to the drainage system.

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There are no specific plumbing code requirements for setting a lavatory other than to follow the manufacturer's installation instructions.

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As with a normal lavatory sink, a wash fountain must have an integral overflow passage embedded within the fixture body

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A rim-set kitchen sink is a kitchen sink designed with a rim lip and is set or dropped into a pre-cut hole in the countertop.

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