Patent ID: 7095222

Claim:
A method of locating leaks in an underground nonmetallic pipe, said underground nonmetallic pipe being in connecting relationship with a plurality of manholes, said method comprising the steps of: locating an underground nonmetallic pipe; determining a portion of said underground nonmetallic pipe to be tested for at least one leak; installing a leak locating system along said portion of underground nonmetallic pipe to be tested; taking at least one measurement of electric field intensity along said portion of nonmetallic pipe to be tested; plotting said at least one measurement of electric field intensity onto a graph; interpreting said graph; and wherein said installing step comprises placing at least two plugs inside said underground nonmetallic pipe at the outer edges of said portion of underground nonmetallic pipe for defining an area of the nonmetallic pipe desired to be tested for leaks and preventing the leaks of a fluid inside the area of the nonmetallic pipe while testing.