490 Series · Eccentric Bushings and Coupling

Fernco 490-405 Pipe Donut – 4" PVC (SCH 40/STD) Compression Seal Gasket for Cast Iron Hub Connections

Part # 490-405

Precise, application-specific fit. Engineered to match specific pipe ODs and cast iron hub dimensions for a secure, interference fit that ensures...
Fast, tool-friendly installation. Installs quickly with standard tools, reducing labor time while delivering a consistent, professional connection.
Durable elastomeric construction. Manufactured from high-quality elastomeric material that resists wear and maintains sealing performance over time.
Trusted and preferred. Proudly manufactured in the united states.

Drawing (PDF) All documents

Dimensions

Dimensional drawing of 490-405 data sheet

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End 1 inside diameter	4.50"
Length	5.76 in
Width	11.13 in
Height	1.82 in
Weight	0.96 lb

Product details

The Fernco 490-405 pipe donut is designed for 4" sch 40/STD PVC pipe connections into cast iron hubs, providing a secure, compression-based seal. Its durable elastomeric construction ensures long-term reliability while maintaining a tight, leak-resistant fit. Ideal for demanding DWV applications, it simplifies installation and delivers consistent performance in the field.

Compression seal technology. Creates a tight, leak-resistant seal by compressing between the pipe and hub—eliminating the need for messy grouts or sealants.

Compatible with multiple materials. Designed for use with cast iron hubs and PVC (sch 40/std) pipe, making it a versatile solution for DWV system connections.

Specs and codes. Complies with ASTM d5926, ASTM c1173 and uniform plumbing code (UPC)