4 inch Cast Iron Soil 1/4 Bend No Hub x No Hub

4 inch Cast Iron Soil 1/4 Bend No Hub Fitting – Engineered for Structural Drainage Systems

The 4 inch Cast Iron Soil 1/4 Bend No Hub fitting is manufactured for use in gravity-fed DWV (drain, waste, and vent) systems where long service life and code compliance are essential. Its quarter-bend geometry allows for directional changes in horizontal to vertical soil lines, supporting smooth flow transitions while maintaining structural integrity under load.

This fitting is produced in accordance with ASTM A888 or CISPI 301 standards, ensuring dimensional consistency and performance compatibility with other no-hub cast iron system components. Designed for both new construction and retrofits, it supports durable, fire-resistant installations in commercial, industrial, and multifamily applications.

Performance Advantages

• ✅ Code-Compliant Geometry: Fabricated with precise radius curvature for reduced flow disruption and optimal hydraulic performance.
• ✅ No Hub Connection: Compatible with standard stainless steel shielded couplings for fast, secure assembly with minimal space requirements.
• ✅ Impact and Load Resistant: Heavy-duty cast iron withstands structural stress and mechanical wear over time.
• ✅ Corrosion Tolerance: Interior and exterior coatings provide extended resistance to moisture and aggressive wastewater environments.

Technical Specifications

• Nominal Diameter: 4 inches
• Material: Cast Iron (per ASTM A888 or CISPI 301)
• Bend Angle: 90 degrees (1/4 bend)
• Joint Type: No Hub (plain-end, mechanical joint compatible)
• Application: Non-pressurized sanitary and storm drain piping systems

Installation Context

This fitting is typically installed in vertical and horizontal waste and vent stacks, including commercial restrooms, mechanical chases, and utility core layouts. No-hub couplings allow for fast, code-approved assembly using torque-limiting wrenches to ensure gasket compression standards are met.

Industry Insight

Cast iron soil pipe systems are valued for their noise-dampening characteristics, non-combustibility, and resistance to internal abrasion, making them suitable for institutional and high-occupancy buildings.

Specifying the 4 inch Cast Iron Soil 1/4 Bend No Hub fitting supports consistent installation practices and reduces rework in both above-ground and below-slab DWV systems. It's a critical component in plumbing layouts where performance, code alignment, and longevity are required.