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.
Richard Nixon was elected the 37th President of the United States (1969-1974) after previously serving as a U.S. Representative and a U.S. Senator from California. After successfully ending American fighting in Vietnam and improving international relations with the U.S.S.R. and China, he became the only President to ever resign the office, as a result of the Watergate scandal.