Faculty do not accrue vacation at the University of Washington. (University Handbook, Vol. IV, page 30, Chapter 2). Nine-month faculty are paid for nine months' service; 12-month faculty are paid for 11 months service over a 12 month period, with one month available for vacation use.  Faculty at the University of Washington do not receive vacation. (University Handbook, Vol. IV, Chapter 2) Salary and Terms of Employment (academic personnel).

Faculty hired on a 9 month basis are paid for nine months service and are expected to use summer for vacation periods.  Faculty hired on a 12 month basis are paid for 11 months service over a 12 month period. One month is available for vacation use during this time.  Faculty should arrange vacation schedules with their department.

PAID FOR MORE THAN 2.5 MONTHS IN SUMMER?

Nine-month faculty with summer funding for more than 2.5 months must submit a request letter to the Dean stating that the faculty member acknowledges and willingly provides full-time effort for 3 months and foregoes time off.  The intent is that a faculty member doesn't have to give up time off in the summer unless wanting to do so. 

Other leave is covered at http://www.washington.edu/faculty/facsenate/handbook/04-05-08.html