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

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

The 4 inch 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 inch 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 inch Cast Iron Soil Wye supports high-performance drainage with minimal maintenance, delivering dependable results in demanding environments.