Friend of mine had to have a new system put in last year because of trees and roots finally took it's toll. The installer used the non gravel type system(pipe with styrofoam) and this year my friends system is backing up. He is having his new beautiful Zoysia grass moved so the work can begin. He's not a happy camper.
The vaults I am planning on using are these black plastic tunnels. Talked to a local septic designer and he said that he uses them in pretty much every system he designs and has yet to have any troubles.....
