Pipe, No-Hub

Definition

No-hub pipe is cast iron pipe fabricated without hubs for coupling.

Purpose

No-hub pipes are used in drainage, waste, and vent (DWV) systems, providing a durable and reliable means of transporting wastewater. The lack of hubs allows for easy installation with mechanical couplings, simplifying repairs and modifications.

Examples of Use

• Plumbing Systems: Used in residential and commercial drainage and waste systems.
• Vent Lines: Installed in vent lines to expel sewer gases safely.
• Storm Drains: Utilized in stormwater drainage systems for durability and corrosion resistance.

Related Terms

• Coupling: A fitting used to connect two lengths of pipe.
• DWV (Drain, Waste, and Vent): Plumbing systems that remove wastewater and vent sewer gases.
• Mechanical Joint: A connection made using mechanical fasteners rather than welding or soldering.

Notes

• Advantages: No-hub pipes are easier to install and modify compared to hub-and-spigot pipes.
• Sealing: Mechanical couplings provide a secure, leak-proof connection without the need for welding or soldering.