500 US gal
Fiberglass
View size chart- US customary
- 6 ft diameter × 4 ft 7 in high
- Metric
- 1.83 m diameter × 1.4 m high
Charts
Septic Tank Size Chart & Dimensions
Compare sourced septic tank size chart entries from 500 to 2,500 gallons, with exterior dimensions, metric conversions, and the named manufacturer model. These are product dimensions, not an excavation plan.
Septic tank dimensions by rated capacity
750 US gal
Precast concrete
View size chart- US customary
- 6 ft 7 in × 5 ft 8 in × 4 ft 11 in
- Metric
- 2.01 m × 1.73 m × 1.5 m
1,000 US gal
Precast concrete
View size chart- US customary
- 8 ft × 5 ft 8 in × 5 ft 2 in
- Metric
- 2.44 m × 1.73 m × 1.57 m
1,250 US gal
Precast concrete
View size chart- US customary
- 8 ft × 5 ft 8 in × 6 ft
- Metric
- 2.44 m × 1.73 m × 1.83 m
1,500 US gal
Precast concrete
View size chart- US customary
- 10 ft 10 in × 5 ft 7 in × 5 ft 8 in
- Metric
- 3.3 m × 1.7 m × 1.73 m
2,000 US gal
Precast concrete
View size chart- US customary
- 12 ft × 6 ft 6 in × 5 ft 8 in
- Metric
- 3.66 m × 1.98 m × 1.73 m
2,500 US gal
Precast concrete
View size chart- US customary
- 12 ft × 6 ft 9 in × 6 ft 5 in
- Metric
- 3.66 m × 2.06 m × 1.96 m