Why a pressure sewer?

A pressure sewer is an alternate to a gravity sewer.  For the following reasons, pressure sewers usually are found to be the most appropriate for existing neighborhoods:
1.  Pressure sewers can be installed with very little disruption to the neighborhood.  In most cases, they are installed by the directional bore method which required little excavation.  Gravity sewers, on the other hand, require extensive excavation and thus cause much more damage to the streets and landscaping.  Streets must be re-paved after a gravity sewer is installed.
2.  The cost of a pressure sewer can be less than the cost of gravity sewer due to lesser restoration costs that would have otherwise been expended with the installation of gravity sewer.