In the past repairing a water line meant digging up the property, cutting the line, taking out part of the old line and replacing it with a new pipe. Today, with new technology, there is a much simpler way. Trenchless pipe liners are a great way to repair those old lines. Besides being neater, and not causing damage to property there are many other advantages to using the trenchless lining method. First of all, the pipe liner has a life expectancy of 50 years. Because there are not joints, there is no crack for tree roots to get into the pipe, or for water to seep out. The water flow is increased because the lining is smoother than cast iron, concrete or clay pipes. Nothing will cling to the sides to cause clogs. Be sure your plumber has experience using this method and be aware that some city codes do not allow trenchless lining.