4 inch Cast Iron Soil Service Weight 1/6 Bend Hub x Soil

4" Cast Iron Service Weight 1/6 Bend Hub – Engineered for Precision in DWV Systems

The 4" Cast Iron Soil Pipe 1/6 Bend Hub is designed to deliver consistent and code-compliant directional changes in drainage, waste, and vent systems. Manufactured to meet ASTM A74 standards, this fitting provides a 60-degree change in flow direction using a single hub connection point, making it an essential component for layout flexibility in both commercial and residential installations.

This service weight fitting is cast from durable gray iron and finished with a protective asphalt coating to resist corrosion and abrasion. The hub end accommodates standard service weight pipe using compression or lead/oakum joints, depending on jobsite requirements and local code mandates. It's ideal for gravity-fed systems requiring long-term durability, structural integrity, and noise-dampening benefits.

Key Product Features

• Material: Gray cast iron with protective coating
• Size: 4" nominal diameter
• Angle: 1/6 Bend (60 degrees)
• Connection: Single hub end (compatible with service weight pipe)
• Compliance: ASTM A74 for service weight DWV cast iron pipe and fittings

Performance and Installation

This fitting is designed for soil, waste, and vent piping systems operating under gravity flow. Installation may require traditional joining methods including lead and oakum or mechanical couplings certified for cast iron. Proper joint assembly and inspection ensure long-term leak resistance and structural support.

The 1/6 bend is frequently used to change direction in stacks, offsets, or where horizontal to vertical transitions are necessary without sharp angles that could cause flow disruption. It’s preferred in multi-story construction where system longevity and reduced noise transmission are critical.

Advantages for Professional Installations

• High strength-to-weight ratio ensures structural support in floor, wall, and ceiling assemblies
• Superior acoustic dampening compared to plastic alternatives, reducing system noise
• Resistant to fire, impact, and temperature fluctuations, suitable for demanding code-regulated environments

Application Areas

Ideal for use in institutional, commercial, and multi-family residential structures. Typically installed in building drainage systems including vent stacks, waste stacks, and branch lines where durable and fire-rated materials are required.

Specification Note

Service weight fittings must be installed with compatible service weight pipe. Verify compatibility of jointing method and compliance with local building codes prior to installation.

Choose the 4" Cast Iron Service Weight 1/6 Bend Hub for durable, code-compliant direction changes in your DWV system. It provides lasting performance, structural integrity, and proven reliability in critical applications.