Before extrusion, the HDPE can be pigmented to yield color-coded pipe. Common PEX tubing colors are natural (hazy clear, unpigmented), white, black, red and blue. The red and blue colors are used to help plumbers and homeowners distinguish between hot and cold water supply lines.
No, there has never been a US President from an independent party; however, at the time of his presidency, George Washington was not affiliated with a political party at all, as there were no parties in the brand new United States of America.
That is true. But in the case of a sitting president, it's a different law -- with the full difference still undefined. Independent counsel Kenneth Starr, by even contemplating a criminal proceeding against a president, ventures into uncharted constitutional wilderness. Consider the questions, zany though some may be.