MAG400 Magnum Coupling 400mm to 499mm Pipe Diameter

Fernco MAG400 drain coupling with a shear banded seal, suitable for pipe with an outside diameter of 400mm to 499mm. Manufactured from EPDM rubber, incorporating a Grade 1 304 stainless steel shear band. Fernco magnum couplings are manufactured with a width of 370mm, specifically created to join and repair large diameter pipes used in sewer, drain and other civil and below ground applications.

The Fernco MAG400 Magnum Coupling is engineered for extra-large drainage pipe connections where maximum clamp strength and sealing confidence are required. Designed for demanding applications, this coupling provides a secure, flexible and long-lasting solution for major drainage installations and repairs.

Constructed from high-quality EPDM rubber and fitted with multiple heavy-duty stainless steel clamps, the MAG400 delivers superior torque retention and resistance to loosening. Its flexible sleeve accommodates minor pipe movement and misalignment, ensuring a consistent airtight and watertight seal across mixed pipe materials such as PVC, clay, concrete and cast iron.

The MAG400 installs easily using standard tools, helping reduce downtime on large-scale projects. With excellent resistance to corrosion, mechanical load and environmental stress, it is ideally suited to industrial, commercial and infrastructure drainage systems.

Key Features & Benefits:

• Heavy-duty Magnum coupling for extra-large pipes
• Durable EPDM rubber construction
• Multiple stainless steel clamp bands
• Airtight and watertight sealing performance
• Accommodates pipe movement and misalignment
• Designed for high-load drainage applications
• Quick, tool-friendly installation
• Suitable for industrial and infrastructure drainage

The MAG400 is a reliable solution for professionals working on large, high-stress drainage connections.