What are risers, and why should I have them on my septic system?
Risers on a septic system are the access points through which a person servicing your septic system can see inside the tank. In the image below you see the three tubes rising from the top of the system. Those are the risers. The top is generally put at ground level for easiest access. Some systems do not have risers built into them. When there are no risers present, anyone trying service the system will have to resort to digging holes in the yard to find the access points to the tank. In some cases it is necessary to bring in excavation equipment if the ground proves too difficult to dig by hand.
If you are given the option to add risers to your system, it would be beneficial to anyone servicing the system in the future if you made sure they are put into place before the system is covered over. Your servicemen will thank you, especially if you call Septic Preservation Services to inspect or service your tank!