Concrete
Heavy and durable. Check seams, cracks, lifting access and bedding.
Septic pumping clears stored sludge and scum. A blocked line or saturated field needs a different response.
Tennessee minimums include 900 gallons for three bedrooms and 1,000 for four. Confirm the installed tank and safe access. Montgomery County recommends annual inspection and pumping at least every three years.
State minimums include 900 gallons for three bedrooms and 1,000 gallons for four. These are storage volumes, not daily treatment rates or a measured Clarksville tank average.
| Bedrooms | Minimum tank capacity |
|---|---|
| 2 or fewer | 750 gallons |
| 3 | 900 gallons |
| 4 | 1,000 gallons |
| 5 | 1,250 gallons |
| 6 | 1,500 gallons |
Add 250 gallons per bedroom above four. The approved design may require more. Commercial systems need a separate flow and wastewater review.
Heavy and durable. Check seams, cracks, lifting access and bedding.
Lighter to move. Correct support, backfill and groundwater protection matter.
Lightweight and corrosion-resistant. Use an approved model and installation method.
Soil depth, rock, safe access and groundwater affect installation. A larger tank cannot fix unsuitable receiving soil.
Check the permit, installed tank capacity and service access. A sewer bill does not necessarily prove a city connection.
Pumping clears accumulated waste. Ask whether both compartments and accessible outlet parts are included.
A returning backup may involve a filter, line, pump or drain field. Diagnose it before another pump-out.
Flooded or saturated soil can make emptying a tank unsafe. Have the conditions assessed first.
Read our Clarksville septic sizing, materials and care guide.
Practical answers for Clarksville homes and businesses.
Montgomery County recommends annual inspection and pumping at least every three years. Follow the system’s plan and measured solids.
It removes tank waste; it cannot restore unsuitable or saturated receiving soil.
Tell us where you are, what is happening and the service you need.