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.
President Benjamin Harrison. Benjamin Harrison is the only United States president elected from the State of Indiana. Not only was he the 23rd president (serving from 1889-1893), but he was also the centennial president, inaugurated 100 years after George Washington.