Yes. A septic tank riser is a pipe made of either plastic, fiberglass, or concrete. It creates a vertical portal at the ground surface for easy access to the septic tank for inspection and pumping out. The lid is then either left exposed or with a very thin layer of soil and grass over it.
A riser is beneficial because it makes your septic tank more assessable. It also helps you save on labor expenses if there is an issue with your septic system.