A septic tank riser is a plastic pipe that runs vertically from the pump-out openings or access ports at the top of a septic tank to about ground level. A simple and seemingly common-sense concept, risers are often missing from standard septic tanks, particularly older models.
Risers are made from material that offers durability against weather and environmental conditions. Typically, risers are 24 inches in diameter. The length of the riser depends on how far below the ground your septic tank is positioned. A secure lid covers the opening of the riser. Because it extends directly from the surface of the lawn to the septic tank, the septic tank riser makes accessing the septic tank for pumping, other maintenance, and inspection much easier, allowing you or a professional technician to avoid searching for the septic tank and digging a hole in your lawn. Not having risers on your septic tank would be like wielding the hood of your car shut. You need easy access to your septic tank to service it.