Norwesco Septic Tank Installation Guide: Features, Specifications, and Best Practices

The installation of septic tanks is a critical step in setting up a reliable and compliant wastewater management system. Norwesco, a leader in polyethylene septic tank manufacturing, provides a range of septic tanks designed for durability, ease of installation, and long-term performance. This guide offers a detailed overview of Norwesco septic tank features, installation instructions, and relevant specifications, based on manufacturer documentation and technical data.

Overview of Norwesco Septic Tanks

Norwesco septic tanks are manufactured using a rotational molding process, which creates a one-piece, seamless construction. This method ensures the tank is watertight and structurally sound, capable of withstanding the environmental and chemical stresses associated with wastewater storage. The tanks are made from polyethylene resin, a material resistant to corrosion, rust, and chemical degradation.

Available in single and double compartment configurations, Norwesco septic tanks come in a range of capacities, from 200 gallons to 3,525 gallons. The 1,000-gallon and 500-gallon models are particularly notable, as they are frequently cited in technical specifications and installation instructions.

Key features of Norwesco septic tanks include:

• Rotationally molded, one-piece construction for durability and structural integrity.
• Watertight lids and gasketed manways for secure access and protection from groundwater.
• Polyethylene material that is FDA approved for wastewater storage and resistant to sewage chemicals.
• Pre-drilled plumbing options including gasketed PVC tee assemblies for inlet and outlet connections.
• Lightweight design for easy transportation and installation by two people.
• State and local approvals for use in multiple U.S. states.

Installation Instructions for Norwesco Septic Tanks

Installation of Norwesco septic tanks requires adherence to technical specifications and compliance with local regulations. The following is a summary of the installation process based on manufacturer documentation and technical drawings.

Pre-Installation Preparation

Before installation, it is essential to verify the specifications of the chosen tank, including its capacity, dimensions, and approved states. Norwesco provides detailed installation instructions for various models, including the 1,000-gallon and 500-gallon tanks.

1. Review Technical Documentation:
   Norwesco provides installation instructions and technical drawings for each model. For example, the 1,000-gallon tank (Part # 40198) includes a technical drawing (40198) and installation instructions specific to its two-compartment design. Similarly, the 500-gallon model (Part # 44830) has its own set of installation guidelines.

2. Verify Local Requirements:
   Prior to installation, users must consult with their local health department to ensure compliance with state and municipal regulations. Norwesco tanks are approved in numerous states, but local requirements may dictate additional specifications such as setback distances, depth, and access requirements.

3. Prepare the Site:
   The installation site must be excavated to accommodate the tank’s dimensions and ensure proper placement. The tank must be placed on a stable, level base to prevent shifting or settling over time. No backfill is required for installation, which streamlines the process.

Installation Steps

1. Transport the Tank:
   Norwesco septic tanks are lightweight and can be transported in a pickup truck. Two people can carry the tank to the installation site, reducing labor requirements and installation time.

2. Position the Tank:
   The tank should be placed in the prepared excavation according to the manufacturer’s specifications. The tank must be oriented correctly to ensure that inlet and outlet connections are aligned with the intended plumbing configuration.

3. Install Plumbing Components:
   For tanks with pre-drilled plumbing options, the gasketed PVC tee assemblies for inlet and outlet connections must be securely attached. The 1,000-gallon tank features a 4" gasketed PVC tee assembly inlet and a 4" gasketed PVC tee assembly outlet, while the 500-gallon model includes a single 20" gasketed manway.

4. Secure the Lids and Manways:
   Norwesco septic tanks are equipped with watertight lids and manways. These must be securely fastened using the provided stainless steel screws and gaskets. The gasket ensures a watertight seal, preventing groundwater from entering the tank and wastewater from leaking out.

5. Conduct a Leak Test:
   Once the tank is in place and all components are securely attached, a leak test should be conducted to ensure the tank is watertight. This can be done by filling the tank with water and observing for any signs of leakage.

6. Backfill (if Required):
   While some models do not require backfill, others may need it for stability. If backfill is required, it should be done carefully to avoid damaging the tank or disrupting the plumbing connections.

7. Install Accessories (Optional):
   Manhole extensions and lid-riser combinations are available for tanks that require access at ground level or for compliance with code specifications. These accessories should be installed according to the manufacturer’s instructions.

Technical Specifications and Model Variants

Norwesco offers a variety of septic tanks, each with distinct specifications and features. The following table summarizes key details for selected models:

Additional models include the 500-gallon tank with a single 20" manway and the 1,000-gallon tank with two 20" gasketed manways, making them suitable for a range of applications from residential to commercial use.

Material and Construction Quality

Norwesco septic tanks are constructed using FDA-approved polyethylene resin, ensuring compliance with federal standards for wastewater storage. The material is resistant to corrosion, chemical degradation, and physical damage, making it a durable alternative to traditional concrete or steel tanks.

The one-piece, seamless design of Norwesco tanks eliminates the risk of leaks due to seams or welds, which are common points of failure in other tank types. The ribbed design further enhances structural integrity, allowing the tank to withstand external pressures from soil and groundwater.

The watertight lid is a key feature of Norwesco tanks. It is attached using stainless steel screws and comes with a gasket to ensure a secure seal. This design prevents groundwater from entering the tank and minimizes the risk of odors or pests escaping.

Warranty and Support

Norwesco offers a manufacturer warranty on its septic tanks, which varies by model. For example, the 1,000-gallon tank is backed by a 5-year warranty, while the 500-gallon model has a 3-year warranty. These warranties cover defects in materials and workmanship, providing peace of mind for users.

In addition to warranties, Norwesco provides technical support through its customer service team. Users are encouraged to contact the company with questions or customization requirements, ensuring that the tank meets specific project needs.

Best Practices for Long-Term Performance

To ensure the long-term performance of a Norwesco septic tank, it is important to follow best practices for installation, maintenance, and usage.

1. Follow Manufacturer Guidelines:
   Always refer to the installation instructions and technical drawings provided by Norwesco. These documents contain critical information about dimensions, plumbing connections, and installation procedures.

2. Comply with Local Regulations:
   Before and after installation, verify that the tank meets all local health department requirements. This includes checking setback distances, depth, and access specifications.

3. Conduct Regular Inspections:
   Periodically inspect the tank for signs of wear, damage, or leaks. Check the manways and lids for secure attachment and watertight seals.

4. Avoid Overloading the Tank:
   Ensure that the tank is sized appropriately for the intended use. Overloading can lead to premature failure or reduced efficiency.

5. Use Approved Accessories:
   When installing manhole extensions, lid risers, or other accessories, use only those approved by Norwesco to ensure compatibility and performance.

6. Maintain Proper Drainage:
   Ensure that the tank is positioned to allow for proper drainage and prevent water accumulation around the tank. This helps to reduce the risk of structural damage or corrosion.

Conclusion

Norwesco septic tanks offer a reliable, durable, and user-friendly solution for wastewater management. With features such as one-piece construction, watertight lids, and pre-drilled plumbing options, these tanks are designed for ease of installation and long-term performance. By following manufacturer instructions and local regulations, users can ensure a successful installation and a septic system that functions efficiently for years to come.

For additional information on installation, specifications, or support, users are encouraged to consult the technical documentation provided by Norwesco or contact their customer service team directly.

Sources

1. 1,000 Gallon Norwesco 2 Comp Underground Low Profile Septic Tank
2. 500 Gallon Snyder 1 Comp Underground Low Profile Septic Tank
3. Norwesco Septic Tank Overview
4. Norwesco Low Profile Septic Tanks