Superior Precast manufactures a full line of WI DSPS-approved precast concrete septic tanks in both standard and low-profile (LP) configurations. Our tanks are available in 1-compartment and 2-compartment designs to meet residential, commercial, and municipal requirements. DSPS approval is current through June 2029.
All tanks are manufactured to SPS 382-384, WI Administrative Code, and Chapters 145 and 160 standards... ensuring watertight construction and structural integrity for decades of reliable service. Custom tank production is available upon request for projects that need non-standard sizing.
Tank Types
- Septic ... standard and low-profile models for residential and commercial systems
- Holding ... sealed tanks for properties without soil-based treatment
- Pump ... dedicated pump chambers for dosing and pressure distribution
- Septic/Pump ... integrated septic and pump chamber in a single unit, reducing installation time and site disruption
- Grease ... interceptor tanks for commercial food service applications
Available Models
Standard Tanks (1-Compartment) ... 600, 750, 1000, 1250, 1700, and 2100 gallon
Low-Profile Tanks (1-Compartment) ... LP650, LP750, LP940, LP1000, LP1250, LP1500, LP1700, LP2100, LP2500, LP3000
Standard Tanks (2-Compartment) ... 1000/600 and 1250/750
Low-Profile Tanks (2-Compartment) ... LP1000/600, LP1250/750, LP1800/1100, LP1500/940
Need a size we don't list? Custom tanks are available upon request up to almost any size.
The No Number 2 Promise
If we don't have the tank size you need, we will upsize you to the next in-stock tank size at no additional charge.
Delivery
- Free delivery within 20 miles of our plant
- Service area covers Wisconsin, Minnesota, Michigan, and beyond... anywhere within a 12-hour delivery radius
- Tanks are delivered and set in place the same day
Why Precast Septic Tanks?
- Longevity ... precast concrete tanks last 40+ years with proper maintenance
- Structural strength ... resist soil pressure, groundwater, and traffic loads
- Watertight ... factory-controlled production ensures consistent quality
- WI DSPS Approved ... certified through June 2029 for code-compliant installations
| Available Sizes (1-Compartment) |
600, 750, 1000, 1250, 1700, 2100 gallon standard; LP650, LP750, LP940, LP1000, LP1250, LP1500, LP1700, LP2100, LP2500, LP3000 low-profile |
| Available Sizes (2-Compartment) |
1000/600, 1250/750 standard; LP1000/600, LP1250/750, LP1800/1100, LP1500/940 low-profile |
| Certification |
WI DSPS Approved (expires June 2029) |
| Standards |
SPS 382-384, WI Administrative Code, Chapters 145 and 160 |
| Max Burial Depth |
96 inches |
| Custom Tanks |
Available upon request up to almost any size |
| Service Area |
Wisconsin, Minnesota, Michigan, and beyond (12-hour delivery radius) |
