Alternative wastewater collection systems, such as pressure sewers, provide affordable service to municipalities, new subdivisions, and areas where gravity sewers are difficult and expensive to install. They can potentially save millions of dollars in contrast with the option of gravity sewer. As opposed to the “big pipes” and deep excavations typically required by gravity sewers, pressure sewers use small-diameter, shallowly-buried mainlines that follow the contour of the land and are easily installed with light-duty equipment.
Because of their affordability, pressure sewers have been installed in thousands of communities over the past several decades. Many of these sewers are now more than 30 years old. Two of these technologies, effluent sewer and grinder sewer, are being proposed in an increasing number of municipalities and new developments.