McLean Lawn Sprinkler Irrigation Fairfax County, Virginia, Va | McLean Irrigation Contractor | Lawn sprinkler system contractor. Professionally installed automatic irrigation system. Automatic lawn watering system, sprinkler installation, underground sprinkler system - Fairfax County, Virginia Va, and Loudoun County – Service provided in all counties in Fairfax and Loudoun. Service also include: Mclean, Great Falls, Potomac, Falls Church, Arlington, Tyson’ Corner, Vienna, Alexandria, Sterling, Ashburn, Centreville, Fairfax, Chantilly, Clifton, Herndon, and Oakton Virginia Va