External Filter Basins (FTB)
Orenco External Filter Basins are used to retrofit an existing residential septic system with an effluent filter. They eliminate the need for costly and sometimes hazardous modifications to an existing septic tank with restrictive access openings or to unusable outlet baffles or tees. External Filter Basins include a basin, an 8in (203mm) Orenco Effluent Filter, and a grade ring for attaching a section of riser pipe to the basin.
- 18in nominal diameter (450mm DN) basin
- Ribbed PVC body
- Fiberglass-reinforced polyester base
- 12in (305mm) tall, 8in (203mm) diameter, Orenco Effluent Filter included
- Extendable filter handle for easy removal
- 4in nominal diameter (100mm DN) inlet and outlet openings
- Grade ring for 18in nominal diameter (450mm DN) riser pipe included
- Adapter kit with grommet and 4in Type 3034 pipe adapter ordered separately (Product Code FTB3034KIT)
- 18in (450mm) grade ring ordered separately
- 18in (450mm) fiberglass access lid ordered separately