A gravity sewer system collects wastewater from residences and transports it to a collection line. Gravity is the force behind the flow. Collection lines are pipes that are installed at a slope to keep both water flowing and solids A gravity sewer system involves digging wide, downward-sloping trenches. This method works for downhill grades but is challenging when the terrain is rocky or slopes uphill. Other challenges include a high percentage of sandy soil, proximity to water or long piping runs. Lift stations are often combined with gravity sewers to "lift" the sewage flow and ensure that it keeps moving. A pressure sewer system can offer a more effective and less costly method for sewage transport. A pressure sewer system uses a grinder pump located either outside the home or in a home's lower level or basement. The grinder pump moves the residence's wastewater through small-diameter service lateral pipes to a larger collection system. Today, pressure sewer systems provide daily service to more than half a million users worldwide and range from a single pump to thousands of pumps. A pressure sewer system provides high reliability and low upfront costs.
Materials, installation and maintenance improvements enhance gravity sewer systems.
03/05/2015