3 inch No Hub Heavy Duty Coupling

Fox Foundry 3" Heavy-Duty No-Hub Coupling – ASTM C1277 Compliant DWV Connector

The Fox Foundry 3" Heavy-Duty No-Hub Coupling is a mechanical joint used to connect no-hub cast iron pipe and fittings in sanitary drain, waste, and vent (DWV) systems. Constructed for high-performance installations, it features a stainless steel shield and compression bands over a neoprene elastomeric sleeve, delivering a code-compliant, leak-resistant joint.

Manufactured in accordance with ASTM C1277 and CISPI 310 standards, this coupling supports alignment stability and accommodates thermal expansion and slight structural movement in both vertical and horizontal installations. The product is engineered for long-term durability in commercial, industrial, and high-occupancy residential projects.

Technical Specifications

• Nominal Size: 3 inch
• Application: No-hub cast iron pipe connections for DWV systems
• Body Material: Neoprene sleeve (ASTM C564)
• Shield Material: Type 304 stainless steel
• Clamp Bands: 4 stainless steel bands with 5/16" hex-head screws
• Standards Compliance: ASTM C1277, CISPI 310, NSF 14 listed
• Torque Requirement: 60 in-lbs per band using a calibrated torque wrench

Installation Guidelines

Install in accordance with ASTM C1277 installation procedures. Ensure pipe ends are square-cut, free of debris, and fully inserted into the coupling. Use a calibrated torque wrench to evenly tighten each band to the specified torque. Couplings should not be used in pressurized applications or with PVC pipe unless otherwise listed or approved.

Common Applications

Used in DWV systems for institutional, commercial, and multi-unit residential buildings. Typical locations include slab penetrations, vertical stacks, lateral branch connections, and transitions between cast iron pipe sections. Also effective in locations where seismic or structural movement must be absorbed without compromising seal integrity.

Performance Insight

Heavy-duty no-hub couplings provide additional rigidity and higher pressure resistance compared to standard-duty models. They are preferred for larger pipe sizes, installations subject to building movement, or where higher mechanical load capacity is required.

Code-Compliant DWV Coupling for High-Demand Environments

The Fox Foundry 3" Heavy-Duty No-Hub Coupling is engineered for reliable joint performance in critical plumbing systems. Built to meet modern mechanical code requirements, this coupling delivers strength, flexibility, and ease of installation in new construction and replacement work.