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Advanced Treatment Unit (ATU)
Tank Depot is authorized distributor for
Florida Advanced Treatment Septic System (ATU)
Available in 400 & 500 GPD, delivering the ultimate solution for Florida homeowners and contractors.
The Florida DOH-approved Norwesco/Snyder ATU septic tank, with BioMicrobics technology, is your go-to solution for a low-profile, affordable compact ATU ideal for residential installations.
Tank Depot is authorized distributor for
Florida Advanced Treatment Septic System (ATU)
Available in 400 & 500 GPD, delivering the ultimate solution for Florida homeowners and contractors.
The Florida DOH-approved Norwesco/Snyder ATU septic tank, with BioMicrobics technology, is your go-to solution for a low-profile, affordable compact ATU ideal for residential installations.
In Stock, Preassembled at
Tank Depot of Pompano Beach, FL
BioMicrobics Low Profile ATU System
Our premium ATU septic tanks are available in two capacity options: 400 GPD and 500 GPD. Both are NSF/ANSI 40 & 245 certified, delivering dependable treatment performance and nitrogen reduction for code-compliant installs. Whether you’re a homeowner investing in a long-term solution or a contractor needing a reliable, inspection-ready system, these ATUs are engineered for confidence from install to approval.
400 GPD. : 118”L x 60”W x 51”H | Weight: 300lbs.
500 GPD. : 157”L x 60”W x 51”H | Weight: 590lbs.
Ready to get certified? If you are a licensed contractor not yet certified for this ATU unit, call us to learn about upcoming training sessions and secure your spot.
BioMicrobics Low Profile ATU System – 400 & 500 GPD
Our premium ATU septic tanks are available in two capacity options: 400 GPD and 500 GPD. Both are NSF/ANSI 40 & 245 certified, delivering dependable treatment performance and nitrogen reduction for code-compliant installs. Whether you’re a homeowner investing in a long-term solution or a contractor needing a reliable, inspection-ready system, these ATUs are engineered for confidence from install to approval.
400 GPD. : 118”L x 60”W x 51”H | Weight: 300lbs.
500 GPD. : 157”L x 60”W x 51”H | Weight: 590lbs.
Ready to get certified? If you are a licensed contractor not yet certified for this ATU unit, call us to learn about upcoming training sessions and secure your spot.
How the Norwesco/BioMicrobics ATU System Works
This Florida DOH–approved Norwesco/Snyder poly septic tank pairs with an integrated BioMicrobics MicroFAST FLEX 0.4 or 0.5 system for simple, effective nitrogen reduction. It’s designed to be reliable and low-maintenance.
Primary Settling Zone
Solids drop. Scum floats. The chamber manages waste separation to prep for treatment. An optional trash screen keeps the system protected.
Aeration Powering Performance
An external blower injects oxygen to circulate and energize the wastewater. This supports fast, efficient aerobic digestion inside the septic tank.
Advanced Media Treatment
The heart of the unit. Fixed media inside the ATU is home to natural microbes that break down organics, pathogens, and excess nutrients.
Clean Discharge, Easy Compliance
Water exits after passing a built-in baffle after treatment. Discharged waste meets ANSI/NSF 40 and 245 standards for nitrogen reduction—approved for Florida installs (DOH #53-161-95D-C3).
1. Primary Settling Zone
Solids drop. Scum floats. The chamber manages waste separation to prep for treatment. An optional trash screen keeps the system protected.
2. Aeration Powering Performance
An external blower injects oxygen to circulate and energize the wastewater. This supports fast, efficient aerobic digestion inside the septic tank.
3. Advanced Media Treatment
The heart of the unit. Fixed media inside the ATU is home to natural microbes that break down organics, pathogens, and excess nutrients.
4. Clean Discharge, Easy Compliance
Water exits after passing a built-in baffle after treatment. Discharged waste meets ANSI/NSF 40 and 245 standards for nitrogen reduction—approved for Florida installs (DOH #53-161-95D-C3).
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Why Trust Tank Depot with Your Advanced Treatment Septic System (ATU)
✔ Site Versatility
Effective in challenging locations such as high water tables, small lots, or near sensitive water bodies.
✔ Time Savings
Instead of searching through multiple options, our form helps streamline the process, delivering a quick and accurate estimate based on your project details.
✔ Expert Recommendations
Our team will guide you through the installation requirements and features of the ATU to ensure it meets local regulations and delivers reliable wastewater treatment.
✔ Expert Support
Completing this form connects you with our ATU specialists for quick responses and expert guidance on installation and compliance.
KEY FEATURES & SPECIFICATIONS
Norwesco Advanced Treatment Unit
Tank Depot is an authorized distributor of the Norwesco/BioMicrobics ATU septic system now in store in Pompano Beach FL. We provide this premium solution for certified installers who need to meet Florida's stringent environmental standards. Plus, we offer regular installation and maintenance training to contractors and septic installers in Florida yet to be certified for the Norwesco/BioMicrobics unit.
A Septic System Engineered for Florida's Unique Demands
Our Norwesco ATU isn’t just an advanced septic system. It’s a comprehensive solution to make your job easier and more profitable.
A Septic System Engineered for Florida's Unique Demands
Our Norwesco ATU isn’t just an advanced septic system. It’s a comprehensive solution to make your job easier and more profitable.
Certified for Florida Compliance
NSF/ANSI 40 & 245 certified, and Florida DOH pre-approved (53-161-95D-C3). This ATU meets state nitrogen-reduction standards—helping you pass inspections and speed up permits from Miami-Dade to the Treasure Coast.
Integrated System, Lowest Maintenance
Built to pair with BioMicrobics MicroFAST FLEX in 0.4 or 0.5, this Norwesco system ensures dependable compatibility. With only one moving part, maintenance stays simple—reducing callbacks and improving client satisfaction.
Competitive Contractor Pricing
Our team guides you in finding the optimal septic system solution for your project based on soil conditions, household size, and regulatory requirements.
Designed for Residential Projects
Confidently bid on the most common jobs. This ATU septic system is perfectly sized for residential homes, including those up to a 4-bedroom house, making it your go-to solution.
Florida-Based Support & Training
Get expert help from a Florida-based team and become certified through hands-on training at Tank Depot. Your go-to resource is right here in-state.
Lowest-Profile Tank Design
Ideal for Florida’s challenging high water tables. The low-profile design requires a shallower excavation. This simplifies your installation process, reduces labor costs, and saves time on site.
Certified for Florida Compliance
NSF/ANSI 40 & 245 certified, and Florida DOH pre-approved (53-161-95D-C3). This ATU meets state nitrogen-reduction standards—helping you pass inspections and speed up permits from Miami-Dade to the Treasure Coast.
Integrated System, Lowest Maintenance
Built to pair with BioMicrobics MicroFAST FLEX in 0.4 or 0.5, this Norwesco system ensures dependable compatibility. With only one moving part, maintenance stays simple—reducing callbacks and improving client satisfaction.
Competitive Contractor Pricing
Our team guides you in finding the optimal septic system solution for your project based on soil conditions, household size, and regulatory requirements.
Designed for Residential Projects
Confidently bid on the most common jobs. This ATU septic system is perfectly sized for residential homes, including those up to a 4-bedroom house, making it your go-to solution.
Florida-Based Support & Training
Get expert help from a Florida-based team and become certified through hands-on training at Tank Depot. Your go-to resource is right here in-state.
Lowest-Profile Tank Design
Ideal for Florida’s challenging high water tables. The low-profile design requires a shallower excavation. This simplifies your installation process, reduces labor costs, and saves time on site.
| Conventional Septic System | Norwesco Tank with BioMicrobics MicroFAST® ATU |
| Only removes solids—limited nitrogen removal | NSF 245 certified for advanced nitrogen reduction |
| Not approved for use in many sensitive zones | Florida DOH pre-approved (Cert #53-161-95D-C3) |
| Requires larger drain fields and more space | Compact, low-profile design for tight job sites |
| May not meet newer Florida regulations | Ideal for small lots and high water tables |
| Slower permitting and increased inspection risk | Helps pass inspections faster and speeds up permits |
| Passive for the better part - only separates solids before reaching the drain field |
The ATU is an active treatment plant that reduces nitrogen and other pollutants thus protecting the environment |
How Our Advanced Treatment Unit Achieves Nitrogen Reduction
Nitrogen runoff is a major concern in Florida—especially near coastal zones, waterways, and environmentally sensitive areas. The Norwesco-BioMicrobics ATU is designed specifically to address that.
BECOME A CERTIFIED INSTALLER
The Norwesco Advanced Treatment Unit (ATU)
Tank Depot is now an authorized distributor of this enhanced onsite wastewater treatment system. We offer both the advanced septic tanks and the certification training you need to provide ATU installation and maintenance services to your clientele.
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