Fernco Adaptor Coupling - 240-265mm to 170-192mm - AC2655

Fernco Adaptor Couplings are designed to connect unadopted drainage pipes with different outside d...

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BradfordsFernco Adaptor Coupling AC2655 for 240-265mm to 170-192mm Drainage Pipes
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Product Information

Full details

The Fernco Adaptor Coupling AC2655 is a high-performance solution designed for contractors and DIY professionals who need to connect drainage pipes of varying outer diameters, specifically bridging the gap between 240-265mm and 170-192mm pipes. It provides a secure, watertight, and airtight seal without the need for traditional, complex bushing methods or excessive excavation. While highly efficient for connecting metal, cast iron, or vitrified clay, users must verify their specific pipe outer diameters before purchase to ensure compatibility, as this coupling is precision-engineered for these specific size ranges.

All features

Model Part NumberAC2655
BrandFernco

Extended Product Information

FAQs

Is this coupling suitable for high-pressure water mains?

No, the Fernco AC2655 is designed specifically for gravity drainage systems and is not rated for pressurized water lines.

Can I use this for underground burial?

Yes, these couplings are engineered to be durable and are fully suitable for direct burial in soil.

What tools do I need for installation?

A torque-limiting screwdriver or wrench is recommended to ensure the bands are tightened to the correct specification.

Can this connect two pipes of the exact same size?

No, this is an adaptor coupling designed specifically to transition between two different pipe diameters.

Does the coupling need to be wrapped in protective tape?

While not strictly required, some installers choose to use corrosion-protection tape in highly acidic soil conditions for extra longevity.

What is the maximum shear force this can handle?

It is designed to meet standard industry performance requirements for shear and heavy load resistance in common drainage applications.

Troubleshooting

Seal is not watertight after installation

Check that the clamp bands are tightened to the correct torque and ensure the pipe surfaces were cleaned of dirt or grit before installation.

Coupling keeps slipping off the pipe

Verify that the pipe outer diameters are within the specified range; if the pipe is too small, the coupling will not achieve sufficient compression.

Difficulty sliding the coupling onto the pipe

Ensure the pipe ends are chamfered or smooth; avoid using abrasive materials that could catch on the rubber inner sleeve.

Pros and Cons

Pros

  • Eliminates the need for pipe-specific bushings
  • Reduces excavation time and labor costs
  • Highly durable stainless steel components
  • Maintains an airtight and watertight seal under pressure
  • Versatile for industrial, agricultural, and residential use

Cons

  • Requires precise measurement of existing pipe outer diameters
  • Limited to the specified 240-265mm to 170-192mm range
  • Not suitable for pressure piping systems

Setup, Compatibility & Care

Installation Steps

  1. Ensure the pipe ends are clean and free of debris to allow the rubber seal to make full contact.
  2. Slide the coupling onto the larger pipe first until it hits the internal stop.
  3. Align the smaller pipe and slide the coupling back over the joint.
  4. Tighten the stainless steel clamp bands to the manufacturer's recommended torque settings using a calibrated torque wrench.

Compatibility

This coupling is intended for non-pressure drainage applications. It is compatible with pipes made of metal, cast iron, or vitrified clay, provided the outside diameters fall within the specified range of 240-265mm (large end) and 170-192mm (small end).

Care and Maintenance

  • Periodically inspect the clamp bands for signs of extreme corrosion or loosening.
  • Do not use petroleum-based lubricants on the rubber seal, as this may degrade the material over time.

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