Best Freight Rates Every Time!

Toggle Nav
Call An Expert

(866) 926-5603

Monday-Friday: 7am-6pm CST
Welcome Sign In / Register
My Cart

Septic Tank Type - 251 to 500 Gallons - 101 to 250 Gallons - Rhode Island

Onsite Wastewater Management Tanks
Septic systems are a critical component of decentralized wastewater management in America, particularly in rural and semi-urban areas. Designed for efficiency and durability, septic tanks provide a sustainable solution for households and industries where access to public sewers is limited. To meet diverse environmental standards and project needs, the septic industry provides a full spectrum of solutions. Tank Depot offers everything from robust, conventional two-chamber septic tanks for standard installations to advanced systems like the Norwesco/Snyder BioMicrobics with MicroFAST technology ATU, engineered for strict regulatory compliance in sensitive areas....

Our range of septic tanks provides reliable solutions for managing wastewater, designed to meet the highest local and federal standards of durability and regulatory compliance. Each type of septic tank is tailored to specific needs, offering versatility, capacity, and technical robustness. Selecting the right sewer tank depends on your specific application, soil conditions, and state regulations.

Septic Tanks Type

Single Compartment Septic Tanks
Single Compartment Septic Tanks

These are a straightforward, cost-effective solution for basic onsite wastewater treatment. The single chamber separates solid waste from liquid effluent, making them ideal for properties with a moderate waste load. The one chamber septic is also ideal for greywater or non-potable water systems.

Dual Compartment Septic Tanks
Dual Compartment Septic Tanks

Also known as two-chamber septic tanks, these systems provide enhanced wastewater treatment. By separating solids in two stages, they offer superior filtration and are a perfect choice for larger properties or areas with stricter environmental compliance requirements.

Septic Pump Tank
Septic Pump Tanks

Solves elevation challenges by pumping wastewater uphill to a leach field. Ideal for both high-volume residential systems and infrequent-use cabins, it features an integrated pump stand for stability. Note: Avoid installation in high water table or clay soil areas.

Multi-Use Underground Septic Tanks
Multi-Use Underground Septic Tanks

A highly versatile solution for septic waste, potable water (with FDA-approved resin), or rainwater storage. Its corrosion-proof polyethylene construction is a durable, low-maintenance alternative to concrete, with select models offering faster, cost-saving installation with no need for special backfill.

Aboveground Septic Tanks
Aboveground Septic Tanks

The ideal solution for temporary or permanent onsite wastewater storage where underground septic tanks are unfeasible. Perfectly suited for construction sites, seasonal cabins, remote properties, mobile job shacks, or in areas with high water tables and rocky soil.

Steel Underground Holding Tanks
Steel Underground Holding Tanks

A durable, multi-use, and cost-effective alternative to concrete and poly tanks from Montgomery Tank & Fab. Engineered from lightweight steel for easy installation, this tank features a corrosion-resistant tar coating promising you years with zero rust. What’s more, the steel holding tank is backed by a 10-year manufacturer warranty.

Advanced Treatment Units (ATUs)
Advanced Treatment Units (ATUs)

For the highest level of onsite wastewater treatment, we offer systems like the Norwesco/Snyder-BioMicrobics with MicroFAST technology Advanced Treatment Unit. These advanced units use biofiltration technology to efficiently reduce nitrogen, making them a compliant,and low-maintenance.

Applications of Tank Depot’s Septic Tank Systems

Residential Wastewater Management
Residential Wastewater Management

Septic systems are crucial for homes in rural and semi-urban areas, providing an effective way to treat household waste while protecting local groundwater from contamination.

Commercial & Industrial Use
Commercial & Industrial Use

Our septic tanks offer robust solutions for businesses, from providing wastewater management for remote facilities to steel holding tanks serving as a reliable grease trap for restaurants and commercial kitchens.

Wastewater Holding
Wastewater Holding

These units can be used as waste holding tanks for temporary installations or remote locations where a traditional septic system isn't feasible, such as at construction sites, RV parks, or event venues.

Stormwater Management
Stormwater Management

Certain multi-use underground tanks are designed to be a key component for stormwater management, helping to control runoff and reduce flooding in urban and residential areas.

Septic Tank Regulations By State

Septic systems are heavily regulated in the USA to ensure proper wastewater management, environmental protection, public health, and groundwater safety. The type of septic tank you'll need—whether a single-compartment septic or dual-compartment system—is primarily determined by local regulations. These regulations take into account factors like wastewater load, water table level, soil composition, and property size to ensure optimal performance and environmental protection.

In areas with high water tables or poor soil absorption, above-ground septic tanks may be mandated. For larger systems, multi-use underground tanks might be recommended to meet specific design requirements.

Each state has its own regulatory framework, often managed by local health departments or environmental agencies, which set standards for septic tank materials, size, placement, and ongoing maintenance. Always consult with your local health department or a licensed septic professional to understand the exact requirements for your property before making any decisions.

Choose the Best Septic Tank for Your Property with Tank Depot

Septic systems represent a complex intersection of environmental science, engineering, and regulatory compliance. The materials and technologies used—whether polyethylene septic tanks for enhanced corrosion resistance or advanced treatment units for nitrogen removal—are pivotal in maintaining system efficiency and protecting groundwater from contamination. By incorporating aerobic treatment, biofiltration, and effluent monitoring technologies, modern septic solutions not only meet but often exceed local environmental standards.

Understanding the intricate details of each component—from the pumps and chambers to the drain fields—is key to designing and maintaining an optimal septic system that will perform reliably for decades.

Our septic tanks are compliant with state-specific requirements, ensuring optimal performance and long-term reliability. Filter by color, size, manufacturer, and product class to find the septic tank that suits your needs. For additional information about septic system installation or state certification requirements, please reach out to one of our reps for guided consultation.

Read more

Shop by Tank Type

4 Items

per page
Set Descending Direction
Capacity Name Diameter Length Width Height SKU Price
Buy 200 Gallon Plastic Septic Pump Tank by Norwesco of Black color for only $559.99 200 Gallons Buy 200 Gallon Plastic Septic Pump Tank by Norwesco of Black color for only $559.99 Norwesco 200 Gallon Plastic Septic Pump Tank 47 47 47 56 N-43745 $523.43$559.99
Buy 300 Gallon Septic Pump Tank by Norwesco of Black color for only $799.99 300 Gallons Buy 300 Gallon Septic Pump Tank by Norwesco of Black color for only $799.99 Norwesco 300 Gallon Septic Pump Tank 54 54 54 54 N-41319 $729.43$799.99
Buy 500 Gallon One Compartment Septic Tank with Low Profile Design by Norwesco of Green color for only $1,133.41 500 Gallons Buy 500 Gallon One Compartment Septic Tank with Low Profile Design by Norwesco of Green color for only $1,133.41 Norwesco 500 Gallon One Compartment Septic Tank with Low Profile Design 97 48 42 N-43522 $1,055.52$1,133.41
Buy 500 Gallon Plastic Septic Pump Tank by Norwesco of Black color for only $1,049.99 500 Gallons Buy 500 Gallon Plastic Septic Pump Tank by Norwesco of Black color for only $1,049.99 Norwesco 500 Gallon Plastic Septic Pump Tank 64 64 64 67 N-40785 $1,049.99
per page
Filter By
Applied Filters
  1. Gallon Capacity 251 to 500 Gallons Remove This Item
  2. Gallon Capacity 101 to 250 Gallons Remove This Item
  3. Septic Approval by State Rhode Island Remove This Item
Clear All
Filter By
State of Manufacture
  1. Arizona 3 items
  2. California 3 items
  3. Georgia 1 item
  4. Minnesota 3 items
  5. New York 3 items
  6. Ohio 4 items
  7. Oklahoma 4 items
  8. Pennsylvania 4 items
  9. South Carolina 2 items
  10. Texas 4 items
  11. Utah 3 items
  12. Washington 3 items
Available In Store
  1. Tank Depot - Anderson CA 1 item
  2. Tank Depot - Dripping Springs TX 4 items
  3. Tank Depot - Duncan SC 2 items
  4. Tank Depot - Cleburne TX 4 items
  5. Tank Depot - Hanford CA 2 items
  6. Tank Depot - Houston TX 4 items
  7. Tank Depot - Yukon OK 3 items
  8. Tank Depot - Phoenix AZ 3 items
  9. Tank Depot - San Antonio TX 4 items
  10. Tank Depot - Scranton PA 4 items
Gallon Capacity
  1. 101 to 250 Gallons 1 item
  2. 251 to 500 Gallons 3 items
  3. 501 to 1000 Gallons 7 items
  4. 1001 to 2500 Gallons 11 items
  5. 2501 to 5000 Gallons 2 items
Color
Manufacturer
  1. Norwesco 4 items
Product Type
  1. No Application Value 4 items
Material
  1. Polyethylene 4 items
Certifications
  1. FDA Approved 1 item
  2. ANSI / NSF 61 1 item
Product Class
  1. No Class Value 3 items
  2. One Compartment Tanks 1 item
Septic Approval by State
  1. Alabama 7 items
  2. Alaska 4 items
  3. Arizona 8 items
  4. Arkansas 7 items
  5. California 7 items
  6. Colorado 4 items
  7. Connecticut 4 items
  8. Delaware 4 items
  9. Florida 6 items
  10. Georgia 6 items
  11. Hawaii 6 items
  12. Idaho 4 items
  13. Illinois 5 items
  14. Indiana 4 items
  15. Iowa 4 items
  16. Kansas 4 items
  17. Kentucky 4 items
  18. Louisiana 7 items
  19. Maine 4 items
  20. Maryland 4 items
  21. Massachusetts 4 items
  22. Michigan 4 items
  23. Minnesota 4 items
  24. Mississippi 5 items
  25. Missouri 4 items
  26. Montana 4 items
  27. Nebraska 5 items
  28. Nevada 6 items
  29. New Hampshire 4 items
  30. New Jersey 4 items
  31. New Mexico 9 items
  32. New York 4 items
  33. North Carolina 6 items
  34. North Dakota 4 items
  35. Ohio 4 items
  36. Oklahoma 7 items
  37. Oregon 4 items
  38. Pennsylvania 4 items
  39. Rhode Island 4 items
  40. South Carolina 6 items
  41. South Dakota 4 items
  42. Tennessee 5 items
  43. Texas 8 items
  44. Utah 6 items
  45. Vermont 4 items
  46. Virginia 4 items
  47. Washington 4 items
  48. West Virginia 5 items
  49. Wisconsin 4 items
  50. Wyoming 4 items
Copyright © Tank Depot 2026. All rights reserved. Credit Card Icons