3 inch Cast Iron Soil Wye No Hub x No Hub x No Hub

3-Inch Cast Iron Soil Wye – No-Hub DWV Fitting for Drainage Systems

The 3 inch cast iron soil wye is a critical component for directing flow within drain, waste, and vent (DWV) systems. Designed to provide a smooth transition from a main horizontal drain to a branch line at a 45° angle, it enables optimal fluid conveyance while maintaining system code compliance. This fitting supports proper air circulation and flow velocity within building drainage systems.

Manufactured from high-strength cast iron conforming to ASTM A888 or CISPI 301 standards, the fitting includes no-hub connections for use with stainless steel shielded couplings. The dense wall structure of cast iron makes it ideal for reducing noise transmission and enhancing fire resistance in multi-unit and commercial buildings.

Functional Advantages

• ✅ Seamless Flow Transition – Wye configuration facilitates a low-turbulence junction between main and branch lines, maintaining system efficiency.
• ✅ Robust Cast Iron Body – Withstands high static loads and mechanical stress in vertical or horizontal DWV piping.
• ✅ Corrosion Resistance – Internal and external surfaces are uniformly coated to reduce oxidation and material degradation in corrosive environments.
• ✅ Code-Conforming Connections – Compatible with no-hub couplings for mechanical joining per UPC, IPC, and local amendments.
• ✅ Noise Attenuation – Cast iron inherently dampens sound transfer from fluid movement, an advantage in high-occupancy structures.

Installation Guidelines

Use stainless steel no-hub couplings meeting ASTM C1540 or C1277 to connect to other cast iron pipe or fittings. Installation should follow manufacturer torque specifications using a calibrated torque wrench to ensure watertight and structurally sound joints. Support piping per code to minimize shear stress at fittings.

Product Specifications

• Material: Gray cast iron, conforming to ASTM A888 or CISPI 301
• Size: 3 inch nominal diameter
• Outlet Angle: 45° wye configuration
• Connection: No-Hub x No-Hub x No-Hub (mechanical joint)
• Applications: Drainage, waste, and vent systems – non-pressure
• Certifications: UPC listed, NSF certified, third-party verified for code compliance

Application Use

This soil wye is typically installed in vertical and horizontal waste lines to facilitate smooth flow from lateral branches into the main drainage path. Suitable for installation behind walls, in basements, and beneath slabs, especially in commercial or multi-family buildings where performance and durability are critical.

System Insight

Cast iron remains the material of choice for many DWV systems due to its longevity, fire rating, and structural rigidity. Wye fittings are essential for maintaining laminar flow and reducing pressure drop at junctions, which helps prevent system backups and ventilation issues.