Sewer Lining Washington D.C.. If you’re planning on having sewer lining done on your Washington D.C. property, make sure the contractor is using the best liner material for your specific needs. Perma-Liner manufactures multiple different sewer lining materials for this exact reason. Many of the older homes in Washington D.C. have hard 90 degree bends, this should be taken into account before any sewer lining is done. The correct sewer lining material will make a world of difference! If you live in Washington D.C., call Perma-Liner for any sewer lining questions you may have.