First draw

First draw: The water that comes out when a tap is first opened. It is likely that is has the highest level of lead contamination from weathering of pipelines.

first draw The water that immediately comes out when a tap is first opened. This water is likely to have the highest level of lead contamination from plumbing materials.

first draw : The water that comes out when a faucet in the kitchen or bathroom is first opened, which is likely to have the highest level of lead contamination from old plumbing solder and pipes.

first draw sample. A one-liter sample of tap water, collected in accordance with CFR Section 141.86(b)(2), that has been standing in plumbing pipes at least 6 hours and is collected without flushing the tap.

First Draw
The water that comes out when a tap is first opened, likely to have the highest level of lead contamination from plumbing materials.
First Order Reaction ...

See also: Soil, Pollutant, Waste, Table, Wastewater