Precast concrete
1,500 Gallon Septic Tank Dimensions
One A.J. Foss 1,500-gallon precast concrete tank measures 10 ft 10 in × 5 ft 7 in × 5 ft 8 in outside. Other models can have a different footprint.
| Specification | US customary | Metric |
|---|---|---|
| Exterior length × width × height | 10 ft 10 in × 5 ft 7 in × 5 ft 8 in | 3.3 m × 1.7 m × 1.73 m |
| Rated liquid capacity | 1,500 US gal | 5,678 L |
| Shipping weight | 12,500 lb | 5,670 kg |
| Liquid per vertical unit | 31 US gal/in | 46.2 L/cm |
- Access covers
- 2
- Delivery assembly
- Preassembled
What this chart establishes
This is one New England product specification. The dimensions are exterior measurements and do not show wall thickness, baffles, freeboard, burial depth, traffic rating, or the clearance required by an installer.
Use the right measurements
Use the model drawing and permit record for excavation or replacement work. To estimate liquid volume, enter internal length, width, and liquid depth in the volume calculator.
Open the septic tank volume calculatorCompare another capacity
Common questions
What are the dimensions of a 1,500-gallon septic tank?
The A.J. Foss concrete example on this page measures 10 ft 10 in × 5 ft 7 in × 5 ft 8 in outside, or about 3.3 m × 1.7 m × 1.73 m. Confirm the drawing for the exact model you are buying or servicing.
Are all 1,500-gallon septic tanks the same size?
No. The gallon rating describes liquid capacity. Material, wall thickness, compartments, structural rating, and manufacturer can change the exterior dimensions.