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

4" Cast Iron Soil Wye – Heavy-Duty Fitting for Drainage Systems

The 4" Cast Iron Soil Wye is designed to facilitate directional changes in gravity-flow drain, waste, and vent (DWV) systems. Manufactured to ASTM A888 or CISPI 301 standards, this fitting provides a reliable transition between horizontal and vertical lines, optimizing flow characteristics and minimizing restrictions in cast iron systems.

Constructed for long-term service in both commercial and residential installations, the soil wye features a durable cast structure that resists deformation, corrosion, and thermal expansion. Its dimensional accuracy and socket compatibility support fast installation and code compliance.

Performance Features

• Cast Iron Construction – Provides superior strength and rigidity for underground and above-ground DWV systems.
• Hub x Hub x Hub Configuration – Designed for use with no-hub couplings or gaskets, depending on project specifications.
• Flow-Optimized Design – The angled outlet promotes efficient flow, reducing turbulence and potential clogging.
• Corrosion-Resistant – Coated with a protective layer to enhance resistance to moisture and aggressive wastewater.
• Sound Dampening Properties – Cast iron naturally minimizes noise transmission, which is advantageous in multi-story and commercial applications.

Technical Specifications

• Size: 4 inches nominal
• Material: Cast Iron
• Connection Type: Hub x Hub x Hub
• Compliance: Meets ASTM A888 / CISPI 301 / NSF Standard 14 / CSA B70

Installation Requirements

This fitting is intended for installation by trained professionals familiar with cast iron DWV systems. Installation may require no-hub couplings, torque wrenches, and alignment tools to ensure code-compliant and leak-free assembly. Always follow applicable local and national plumbing codes during installation.

Typical Applications

The 4" Soil Wye is widely used in horizontal waste lines to connect branch lines at an angle, supporting proper drainage flow. It is common in both slab and above-grade installations, as well as in institutional, multi-family, and commercial facilities.

Industry Insight

Cast iron DWV systems remain the standard in many commercial and healthcare buildings due to their fire resistance, longevity, and noise-reduction properties. Properly installed fittings like this soil wye can exceed 50 years of service life.

Selecting the right components is critical for system integrity. The 4" Cast Iron Soil Wye supports high-performance drainage with minimal maintenance, delivering dependable results in demanding environments.