Fernco 12CMA Concrete Manhole Adapter 12 Inches

Product Description

The FERNCO 12CMA is a concrete manhole adapter designed to create a flexible, watertight connection between a concrete manhole structure and an adjoining pipe. This adapter accommodates movement, settling, and misalignment that occur in underground drainage and sewer systems over time. It is used in municipal, commercial, and residential applications wherever a reliable seal at the manhole entry point is required. Licensed plumbers and civil contractors typically specify and install this component during new construction or rehabilitation of sewer infrastructure. The 12-inch size suits larger mainline applications.

This adapter fits 12-inch manhole openings and is used in underground gravity-flow sewer and drainage systems. It provides a resilient connection at the point where a pipe enters or exits a concrete manhole barrel or riser. Common install scenarios include new sewer lateral tie-ins, manhole rehabilitation projects, and replacement of failed rigid connections that have cracked or shifted due to ground movement or settlement.

Key Features

• Flexible design accommodates pipe misalignment and ground settlement at the manhole interface
• 12-inch size suits mainline sewer and large-diameter drainage applications
• Designed for use with concrete manhole structures
• Creates a watertight seal to prevent infiltration and exfiltration at the pipe-to-manhole connection
• Sold as a single unit for straightforward procurement on single-connection jobs

Compatibility

Designed as an OEM-style replacement or new-installation adapter for 12-inch concrete manhole structures in residential and commercial gravity sewer and drainage systems.

Installation Notes

Installation is typically performed by a licensed plumber or civil contractor in accordance with local plumbing codes and applicable standards. The manhole opening and pipe end should be clean and free of debris before fitting the adapter. Shut off or divert flow in the line before beginning work in or around an active sewer structure. Follow the manufacturer's instructions for proper seating and any required clamping to achieve a secure, watertight fit.