Description
3″ x 24″ Septic Manhole Frame and Cover
The 3″ x 24″ Septic Manhole Frame and Cover is a light duty cast iron access assembly designed for septic tanks, pump chambers, distribution boxes, grease interceptors, and underground utility structures. Manufactured from durable cast iron, this frame and cover provides secure access for inspection and maintenance while protecting critical infrastructure from environmental exposure and surface loading. Typically used for pedestrian only applications. For vehicular traffic bearing solutions take a look at the 4“ x 24“
Designed for residential, pedestrian commercial, and municipal applications, this septic manhole frame and cover delivers long service life, corrosion resistance, and dependable performance in non-traffic and light-duty installations. Optional locking, gasketed, and custom-marked configurations are available to meet project requirements.
Product Features
- Heavy-duty cast iron construction
- 24″ clear access opening
- 3″ frame height
- Precision-machined seating surface
- Available with SEPTIC marking or plain cover
- Optional locking stainless steel bolts
- Optional watertight gasket system
- Black bituminous coating available
- Custom logos and lettering available
- Corrosion-resistant design
- Long service life
- Manufactured for septic and utility applications
Applications
The 3″ x 24″ Septic Manhole Frame and Cover is commonly used for:
- Septic Tanks
- Septic Risers
- Pump Chambers
- Distribution Boxes
- Grease Interceptors
- Utility Vaults
- Wastewater Treatment Systems
- Residential Septic Systems
- Commercial Septic Systems
For larger openings, view our 3″ x 30″ Septic Manhole Frame and Cover or browse our complete collection of Manhole Frames and Covers.
Product Specifications
| Property | Specification |
|---|---|
| Product Type | Septic Manhole Frame & Cover |
| Opening Diameter | 24″ |
| Frame Height | 3″ |
| Material | Cast Iron |
| Cover Style | Solid Cover |
| Class | Light Duty |
| Finish | Plain or Bituminous Coating |
| Options | Locking, Watertight, Custom Markings |
| Installation | Septic Tanks & Utility Structures |
Material Specifications
| Component | Material |
|---|---|
| Frame | Cast Iron |
| Cover | Cast Iron |
| Optional Material | Ductile Iron |
| Finish | Asphaltic / Bituminous Coating Available |
| Bearing Surface | Precision Machined |
Cast iron remains the preferred material for septic manhole covers due to its strength, durability, and resistance to environmental conditions. Many municipal and utility castings are manufactured to ASTM A48 Class 30B or 35B standards, with ductile iron options available for higher impact resistance and heavy-duty loading applications.
Typical Dimensions
| Specification | Dimension |
|---|---|
| Clear Opening | 24.0″ |
| Frame Height | 3.0″ |
| Cover Diameter | 24.0″ |
| Seating Depth | Approximately 1.0″ |
| Cover Thickness | Approximately 1.0″ – 1.25″ |
| Assembly Weight | Approx. 140 – 180 lbs |
| Cover Weight | Approx. 80 – 120 lbs |
Dimensions may vary based on casting configuration and project requirements. Similar 24-inch municipal manhole castings commonly range between 140 and 190 pounds depending on frame design and loading requirements.
Performance Characteristics
| Property | Value |
|---|---|
| Corrosion Resistance | High |
| Impact Resistance | High |
| Freeze-Thaw Resistance | Excellent |
| UV Resistance | Excellent |
| Service Life | 30+ Years Typical |
| Structural Strength | Excellent |
Locking and Watertight Options
Amercast offers optional locking and watertight configurations for applications requiring additional security or infiltration protection.
Available options include:
- Stainless Steel Locking Bolts
- Rubber Gasket Systems
- Watertight Covers
- Bolt-Down Covers
- Custom Utility Markings
- Custom Logos
For projects requiring additional protection from groundwater infiltration, view our 3″ x 24″ Septic Manhole Frame and Cover Locking Watertight.
Custom Markings and Logos
Amercast can provide custom castings featuring:
- SEPTIC
- SEWER
- WATER
- GREASE
- STORM
- Municipal Logos
- Utility Company Branding
- Custom Lettering
Our design team can provide CAD renderings and approval drawings prior to production.
Benefits of Cast Iron Septic Covers
Cast iron manhole assemblies remain the industry standard for septic and utility access systems because they provide superior strength, durability, and security compared to plastic alternatives. Properly installed cast iron covers resist weather exposure, heavy use, and accidental damage while maintaining a professional appearance for decades.
Related Products
- 3″ x 24″ Septic Manhole Frame and Cover Locking Watertight
- 3″ x 24″ Septic Manhole Frame and Grate
- 3″ x 30″ Septic Manhole Frame and Cover
- Manhole Frames and Covers
- Septic Covers
Request a Quote
Amercast manufactures high-quality cast iron septic manhole frames and covers for residential, commercial, and municipal projects throughout North America. Contact our team today for pricing, custom markings, locking options, watertight assemblies, and project-specific requirements. Call us at 516-624-8543 or email at [email protected]
