The White House Plumbers were not plumbers at all, infact they had absolutly nothing to do with the plumbing of the White House. Instead, there main goal was to prevent the leaking of information outside the White House's walls. G. Gordon Liddy, John Paisley (a member of the CIA), John Erlichman and E. Howard Hunt, were all members of the White House Plumbers . This group of men were assigned by President Nixon to complete various tasks. One of there first jobs, was the burglary of the office of Daniel Ellsberg's Los Angeles psychiatrist, Lewis J. Fielding, in an effort to uncover evidence to discredit Ellsberg, who had leaked the Pentagon Papers. The plumbers broke into the office late at night, retrieving the documents they needed. They left pills on the ground in the office to make it appear that drugs were the reason for their visit. This mission was unsuccessful and also highly illegal. President Nixon was not allowed to order an illegal search and sesiure, but he did so anyway. Daniel Ellsberg arrived at his office the next morning and saw the mess left behind. He reported the file the plumbers had been looking for had been gone through, but investigators were unsure of who and why, so no one was charged.
| Daniel Ellsberg |

Sources:
http://www.theatlanticwire.com/politics/2011/08/nixon-gold-standard-gamble-interrupting-bonanza/41278/
http://en.wikipedia.org/wiki/Watergate_burglary
http://en.wikipedia.org/wiki/White_House_Plumbers
http://www.maryferrell.org/wiki/index.php/Watergate
http://iml.jou.ufl.edu/projects/Fall06/Weiner/pages/People/plumbers.htm