3″ x 24″ Septic Bolted Manhole Frame and Cover

The 3″ x 24″ Septic Bolted Manhole Frame and Cover is a secure-access cast iron assembly engineered for septic tanks, onsite wastewater treatment systems, residential sewer infrastructure, and buried utility structures requiring a mechanically fastened cover. Unlike conventional loose-lay septic lids, this design incorporates a two-bolt retention system that secures the cover directly to the frame, providing additional protection against accidental displacement, unauthorized access, and environmental intrusion.

Featuring a 24-inch diameter cover, a 3-inch frame profile, and an integrated rubber gasket, this assembly is specifically designed for septic installations where reliability, containment, and service accessibility are priorities. The bolted configuration allows maintenance personnel to remove the cover when necessary while helping keep the system securely sealed during normal operation.

Commonly specified for residential septic systems, commercial wastewater treatment installations, pump chambers, dosing tanks, and septic riser systems, this frame and cover provides a practical combination of accessibility, security, and long-term durability.

Product Features

• 24″ round cast iron cover
• 3″ frame height
• Two-bolt fastening system
• Integrated rubber gasket
• Watertight sealing design
• Cast iron construction
• Suitable for septic tank applications
• Available with SEPTIC markings
• Available with plain cover option
• Custom logos and lettering available
• Optional protective coating
• Easy service access when required
• Long-term corrosion resistance

Engineered for Secure Septic Access

Access points are one of the most important components of a septic system because they allow routine inspection, pumping, cleaning, and maintenance activities. The 3″ x 24″ Septic Bolted assembly provides a dependable access solution while helping protect the opening between service intervals.

The dual-bolt configuration secures the lid to the frame using stainless steel fasteners positioned opposite one another. This arrangement helps keep the cover properly seated while still allowing straightforward removal when maintenance work is required. Amercast commonly furnishes these units with stainless steel hardware and gasketed sealing systems to improve security and environmental performance.

Typical Applications

The 3″ x 24″ Septic Bolted Manhole Frame and Cover is frequently used for:

Septic Tank Access

Provides secure access to residential and commercial septic tanks for inspection and pumping operations.

Septic Riser Systems

Works with riser installations that bring service access closer to finished grade.

Pump Chambers

Provides controlled access to pumping equipment and wastewater transfer systems.

Dosing Tanks

Allows maintenance personnel access to dosing equipment and system controls.

Onsite Wastewater Treatment Systems

Suitable for aerobic treatment systems, advanced treatment units, and decentralized wastewater infrastructure.

Residential Developments

Frequently installed in new home construction, septic replacements, and system rehabilitation projects.

Technical Specifications

Engineering Dimensions

Based on the engineering drawing supplied for the AC 1040 septic casting:

The dimensional layout provides a generous service opening while maintaining a compact footprint appropriate for septic applications.

Benefits of a Bolted Septic Cover

Enhanced Safety

Fastening bolts help prevent accidental movement of the cover and provide additional protection around service openings.

Controlled Access

The bolted design discourages unauthorized entry while allowing authorized maintenance personnel to remove the cover when necessary.

Improved System Containment

The gasketed assembly helps reduce the potential for water infiltration and assists in maintaining system integrity.

Reduced Cover Movement

Mechanical attachment minimizes shifting caused by vibration, landscaping activities, or incidental contact.

Long-Term Reliability

Cast iron and stainless steel components provide a durable solution designed for years of field service.

Watertight Gasket System

A key feature of this assembly is the integrated gasket located between the cover and frame. When the cover is secured with bolts, the gasket compresses and helps create a watertight seal around the opening.

Benefits include:

• Reduced surface water infiltration
• Improved odor containment
• Protection from debris intrusion
• Enhanced environmental control
• Improved septic system performance

Amercast utilizes gasketed designs throughout its watertight access product line to improve sealing performance and operational reliability.

Material Characteristics

Cast iron remains one of the most widely specified materials for septic access covers because of its durability, dimensional stability, and resistance to environmental exposure.

Compared with plastic and lightweight alternatives, cast iron provides superior resistance to cracking, deformation, and accidental damage.

Cover Marking Options

Amercast can furnish this casting with:

• SEPTIC
• SANITARY
• SEWER
• PLAIN COVER
• PROPERTY NAME
• COMPANY LOGO
• MUNICIPAL IDENTIFICATION
• CUSTOM LETTERING

Custom castings are available for homeowners, contractors, municipalities, utilities, and commercial property owners.

Available Project Enhancements

This assembly may be supplied with a variety of project-specific options, including:

• Stainless Steel Hardware
• Additional Security Fasteners
• Custom Cover Markings
• Decorative Logos
• Bituminous Coating
• Galvanized Finish
• Bronze Appearance Finish
• Watertight Gasket Systems
• Utility Identification Markings

These options allow owners and engineers to tailor the casting to site-specific operational and aesthetic requirements.

Custom Casting Capabilities

Amercast manufactures specialty castings for municipalities, contractors, engineers, septic installers, utility authorities, and private property owners.

Custom capabilities include:

• Septic Covers
• Utility Covers
• Logo Covers
• Decorative Castings
• Security Covers
• Replacement Lids
• Custom Diameter Covers
• Specialty Access Castings
• Municipality-Specific Designs
• Project-Specific Configurations

Amercast maintains one of the industry’s broadest selections of cast iron access products and custom casting patterns.

Related Products

• Manhole Frames and Covers
• 3″ x 18″ Septic Manhole Frame and Cover
• 3″ x 24″ Septic Manhole Frame and Cover
• 6″ x 24″ Manhole Frame and Cover
• 6″ x 24″ Locking Watertight Manhole Frame and Cover
• Adjustable Manhole Risers
• Manhole Risers and Extension Rings
• Municipal Castings

Industry Resource

For information regarding onsite wastewater treatment systems, septic maintenance, and decentralized wastewater infrastructure:

National Environmental Services Center (NESC)

The National Environmental Services Center provides educational resources and technical guidance related to septic systems and decentralized wastewater treatment.

Why Choose Amercast?

Amercast supplies cast iron access products for septic contractors, municipalities, wastewater professionals, engineers, and property owners throughout North America. Our septic frame and cover assemblies are designed to provide dependable access, secure fastening, and long-term field performance.

Whether your project requires a standard septic cover, a bolted assembly, custom markings, or a specialized casting configuration, Amercast has the manufacturing capabilities and industry experience to support your requirements.

Request a Quote

Need pricing, engineering information, custom markings, shop drawings, or technical assistance?

Contact Amercast today to request a quote for the 3″ x 24″ Septic Bolted Manhole Frame and Cover. Our team can assist with residential septic systems, commercial wastewater projects, utility applications, and custom casting requirements throughout North America.