Liquid Plumber or Draino right?
Not so fast. Keep in mind that these products are acidic or caustic based products and can cause damage to your metal drain lines and can be real difficult for the city to clean up. The best option is to have a professional come to your home and clean your drain lines mechanically, and then treat them with a once a month Bio One bacteria. The bacteria is a preventive maintenance product, and will keep us from having to come back on a regular basis.
Call A and J Plumbing at (214) 929-7012 to have a professional plumber repair your drain line.