Graf sewage treatment plants

One clean tank with only one chamber required
Less energy consumption and less wear
No mechanical elements in the waste water
No pumps in the waste water
No electrical components in the waste water
Incredibly little sewage sludge
No concrete on most sites, just gravel base and backfill
Plug and play system, no wiring required
Near silent operation
Programable holiday mode
10-year warranty on the tank
2-year warranty on compressor and parts