2 inch No Hub Soil Coupling

2 Inch No-Hub Soil Coupling – Stainless Steel Shielded, For DWV Systems

The 2 inch no-hub soil coupling is engineered for joining cast iron soil pipe in non-pressurized drain, waste, and vent (DWV) systems. This fitting consists of a stainless steel shield with a neoprene gasket and stainless steel clamp bands. It complies with current plumbing codes and is designed for use in conjunction with no-hub cast iron pipe in both residential and commercial systems.

Material Construction and Compliance

This coupling is manufactured in accordance with CISPI 310 and ASTM C1277 standards for cast iron soil pipe fittings. The gasket is made from neoprene (ASTM C564), while the shield and clamps are constructed of corrosion-resistant stainless steel. It is suitable for below-ground and above-ground installations. Key features include:

• ✅ Shield Material: Type 301 or 304 stainless steel
• ✅ Clamp Bands: Stainless steel worm-drive clamps or torque bands (depending on specification)
• ✅ Gasket: Neoprene (ASTM C564 compliant), resistant to sewage, water, and temperature cycling
• ✅ Code Compliant: IAPMO Listed, UPC-certified for DWV systems

Technical Specifications

• Nominal Size: 2 inch
• Application: Drain, Waste, and Vent (DWV) connections
• Standards: CISPI 310, ASTM C1277, ASTM C564
• Maximum Test Pressure: Typically 10–15 psi per code (non-pressurized systems)

Installation Requirements

No-hub couplings require installation using a calibrated torque wrench to achieve the proper band compression. Clamps must be tightened evenly to the manufacturer-specified torque value (commonly 60 in-lbs) to ensure a gas- and water-tight seal. Couplings are used to join plain-end cast iron pipe without hub flanges and are not intended for pressure applications.

Common Applications

This soil coupling is used extensively in DWV systems behind walls, below grade, and in floor systems for multi-family dwellings, commercial structures, and institutional facilities. It facilitates alignment and secure joining of horizontal and vertical stacks or offsets in drainage layouts.

System Integration Note

No-hub couplings are required by code in many jurisdictions for cast iron installations due to their vibration resistance, flexibility, and ease of maintenance access. All components must be listed and tested for compatibility to ensure system integrity.