What is PEX? PEX is an acronym for crosslinked polyethylene. It is a flexible, durable, proven piping product that has been used in plumbing systems for more than 20 years. PEX tubing wonât pit, scale or corrode and, because of its flexibility, it also offers potential freeze-damage protection. Uponor plumbing systems feature PEX-a tubing, which is considered the superior PEX tubing manufacturing method in the industry.
Answer Wiki. Ronald Reagan is the only U.S. president who has been divorced. One First Lady, Betty Ford, married and divorced before marrying a second husband, who became President Gerald Ford. Andrew Jackson's wife, Rachel, was divorced by her first husband, Lewis Robards, because she lived with Jackson while still married to Robards.
1 Woodrow Wilson was the only president to have two daughters get married in the White HouseâJessie to Francis B. Sayre, Sr. on November 25, 1913, and Eleanor to Secretary of the Treasury William G. McAdoo on May 7, 1914.  James Garfield's mother Eliza was the first mother to witness her son's inauguration as president.