4 inch Cast Iron Soil Service Weight 1/16 Bend Hub x Soil

4" Cast Iron Soil Bend – No-Hub Elbow for DWV Applications

The 4" cast iron soil bend is a no-hub elbow fitting used in drainage, waste, and vent (DWV) systems to change direction in soil or waste piping. Designed for horizontal or vertical installations, this fitting is manufactured to meet ASTM A888 and CISPI 301 specifications, ensuring durability and dimensional consistency for code-compliant installations.

Fabricated from cast iron for strength and longevity, this soil bend is suitable for high-traffic and multi-story residential or commercial structures where performance and sound attenuation are essential. It connects using stainless steel shielded couplings (no-hub couplings) with neoprene gaskets to provide a secure and leak-resistant joint.

Product Features

• ✅ Material: Gray cast iron conforming to ASTM A888 and CISPI 301
• ✅ Nominal Size: 4 inches
• ✅ Connection Type: No-hub (requires shielded coupling, not included)
• ✅ Angle: Typically 90° (elbow/bend type)
• ✅ Wall Type: Service Weight – designed for above or below-grade use

Installation Notes

Install using torque-limited hubless coupling assemblies compliant with ASTM C1540 or CISPI 310. Ensure pipe ends are properly deburred and aligned prior to tightening the stainless steel band clamp assemblies to recommended torque settings (typically 60 in-lbs). Do not use solder or thread sealants with cast iron no-hub joints.

Applications

This 4" soil bend is commonly used in gravity-fed DWV systems, including main stacks, lateral branches, and floor drain transitions. Applicable in both new construction and renovation work where a durable directional change is needed in cast iron systems.

Additional Considerations

Cast iron offers fire resistance and superior acoustic dampening compared to plastic alternatives. It is frequently selected for installations requiring minimal noise transmission through walls and floors, such as in hospitals, schools, and hotels.

This 4" cast iron soil bend is engineered for use in DWV systems requiring code-approved, long-life performance. Proper installation in accordance with local plumbing codes is required to ensure system integrity and compliance. ????️