Grade-Critical Pipe Connections

Eccentric Series

Maintain a continuous flowline when connecting pipes with different outside diameters in critical grade conditions.

Fernco Eccentric Series flexible coupling

Designed Around the Flowline

Fernco Eccentric Couplings are designed for applications where maintaining the internal pipe flowline is critical.

The eccentric design aligns the inside walls of pipes with differing outside diameters, helping create a smooth transition through the connection.

Important: Eccentric couplings are supplied as a two-piece coupling and bushing combination, with the exception of the 1002-64EC one-piece Eccentric Coupling.

Keep the Inside Walls Aligned

A standard centered transition can create an offset at the bottom of the pipe when the connected pipes have different outside diameters.

The Fernco Eccentric Series positions the connection to align the interior flowline, reducing obstruction through the transition and helping maintain proper gravity flow.

Comparison showing aligned flowline with a Fernco Eccentric Coupling

Product Details

Features

  • Aligns the inside walls of pipes with differing outside diameters
  • Helps maintain an obstruction-free flowline
  • Designed for critical-grade drainage applications
  • Meets ASTM C1173 and ASTM D5926
  • 300 Series stainless steel clamps

Technical

  • Maximum Test Pressure: 4.3 PSI (29.6 KPA)
  • Maximum Operating Temperature: 140° F non-consistent
  • Configuration: Two-piece coupling and bushing combination on most models

Eccentric Series Options

Select the series based on the pipe materials being connected. Additional applications may also be available or custom ordered.

1002 EB Series

Clay to Cast Iron or Plastic

1006 EB Series

Concrete to Cast Iron or Plastic

1051 EB Series

Ductile Iron to Cast Iron or Plastic

1055 EB Series

Ductile Iron to Ductile Iron

1056 EB Series

Cast Iron, Plastic, Copper, Steel or Lead to Cast Iron, Plastic, Copper, Steel or Lead

The listed series represent common sewer pipe size and material combinations. Most Eccentric Series configurations consist of a coupling and bushing combination. Specific applications not shown may be available or custom ordered.

Need Help with an Eccentric Connection?

Tell us the pipe materials and sizes you're connecting and our team can help identify the appropriate Eccentric Series configuration.

Contact Fernco