What it does
An effluent filter sits in the outlet of the septic tank. Liquid passes through it on the way to the drain field; small solids that would otherwise clog the field are caught.
Why it's worth it
- Extends the life of the drain field
- Catches problems early — a clogged filter shows the tank needs attention
- Inexpensive compared to field replacement
Maintenance
The filter needs to be pulled and rinsed periodically, often when the tank is pumped. With a riser over the outlet, it's easy to reach.
Septic questions
Does every tank have a filter?
Many newer tanks do; older tanks often don't. One can usually be added.
How often should it be cleaned?
Often at each pumping, or more if it's clogging.
Can a clogged filter cause backups?
Yes — slow drains can be a sign the filter needs cleaning.