![Filter and pump installation on a new septic tank in a sand and gravel filter bed showing the filter, pump, plastic liner, sand layer and heap of grav Stock Photo - Alamy Filter and pump installation on a new septic tank in a sand and gravel filter bed showing the filter, pump, plastic liner, sand layer and heap of grav Stock Photo - Alamy](https://c8.alamy.com/comp/KC6GHF/filter-and-pump-installation-on-a-new-septic-tank-in-a-sand-and-gravel-KC6GHF.jpg)
Filter and pump installation on a new septic tank in a sand and gravel filter bed showing the filter, pump, plastic liner, sand layer and heap of grav Stock Photo - Alamy
![Fact Sheet: Septic Systems - Subsurface Sandfilters - Hamilton County Public Health | Hamilton County Public Health Fact Sheet: Septic Systems - Subsurface Sandfilters - Hamilton County Public Health | Hamilton County Public Health](https://www.hamiltoncountyhealth.org/wp-content/uploads/sandfilters.png)
Fact Sheet: Septic Systems - Subsurface Sandfilters - Hamilton County Public Health | Hamilton County Public Health
![Outlet Filter Maintenance - Northboro Septic, Inc.: Septic Installation, Repair & Tank Pumping, Title V Inspections Outlet Filter Maintenance - Northboro Septic, Inc.: Septic Installation, Repair & Tank Pumping, Title V Inspections](http://www.northboroseptic.com/wp-content/uploads/2015/12/maint-chart1.jpg)
Outlet Filter Maintenance - Northboro Septic, Inc.: Septic Installation, Repair & Tank Pumping, Title V Inspections
![6 Septic tank with anaerobic filter (Modified from: Tilley et al., 2008) | Download Scientific Diagram 6 Septic tank with anaerobic filter (Modified from: Tilley et al., 2008) | Download Scientific Diagram](https://www.researchgate.net/profile/Suwartanti-Nayono/publication/294752230/figure/fig27/AS:669569316302860@1536649173580/Septic-tank-with-anaerobic-filter-Modified-from-Tilley-et-al-2008.png)
6 Septic tank with anaerobic filter (Modified from: Tilley et al., 2008) | Download Scientific Diagram
![The Septic Doctor - Myth No.6: effluent filters are not necessary. Why should I spend the money when my parents never had one on their tank and it still works fine. The Septic Doctor - Myth No.6: effluent filters are not necessary. Why should I spend the money when my parents never had one on their tank and it still works fine.](https://www.septicdoctor.ca/images/blog/2017/septic-system-diagram.jpg)