The break happened just before 7:00 a.m. at the intersection of Tacony Street and Aramingo Avenue.
The incident started when residents reported smelling a gaseous odor in the area.
Philadelphia Gas Works employees went door to door, taking gas readings in the neighborhood while trying to determine the source of the break.
Once located, the break was quickly fixed by PGW workers and the situation was placed under control.
The break caused some road closures this morning, but traffic is now back to normal.