Do you have a blocked drain? We use Vaporooter as one of our solutions to clear your drains. Vaporooter is injected into the blocked drains. It is a combination of herbicides that are placed in sewer lines as a foam for the purpose of eliminating roots and preventing the further destruction of sewer pipes caused by live tree roots. Only roots within the pipe and a very short distance outside the pipe are affected. Trees and shrubs immediately above ground are not harmed.