6 inch x 4 inch Black Iron Bushing

6 inch x 4 inch Cast Iron Bushing – Durable Reducing Solution for DWV Systems

The 6 inch x 4 inch Cast Iron Bushing is a robust reducing fitting designed for use in soil, waste, and vent (DWV) systems. Engineered to join larger diameter pipe to smaller fittings, this bushing allows seamless transitions in vertical and horizontal stacks. Manufactured in accordance with ASTM A888 and CISPI 301, it meets the performance and dimensional standards required for modern cast iron piping installations.

Product Highlights

• Material: Durable cast iron construction for long service life in sanitary drainage systems
• Function: Reduces from 6 inch pipe to accept 4 inch fittings in no-hub soil systems
• Connection Type: Hub-to-spigot configuration compatible with no-hub couplings meeting ASTM C1277
• Design: One-piece solid casting ensures structural integrity and accurate fitment
• Standard Compliance: Certified for use in DWV applications as defined by national plumbing codes

Advantages for Professional Use

• Reliable Transitions: Facilitates reduction in pipe diameter without compromising structural or hydraulic performance
• Heavy-Duty Performance: Withstands static and dynamic loads typical in high-rise, commercial, and industrial construction
• Code-Compliant Fit: Manufactured for precise dimensional tolerance, supporting inspection readiness and long-term durability
• Low Sound Transmission: The dense material composition provides superior noise-dampening versus thermoplastic alternatives

Installation Notes

To ensure a watertight and mechanically secure fit, use with approved stainless steel shielded couplings conforming to CISPI 310. Proper installation requires alignment support and torque-controlled tightening per coupling manufacturer guidelines. Avoid excessive lateral stress during insertion to maintain joint integrity.

Applications

This 6 inch x 4 inch cast iron bushing is ideal for reducing connections in multi-story commercial buildings, institutional settings, and retrofits where space and structural demands require cast iron durability. Frequently used in vertical stacks, offsets, and sanitary branches transitioning to smaller lateral piping.

Did You Know?

Cast iron DWV systems not only offer enhanced fire resistance and longevity but are also chosen for their sound attenuation properties in noise-sensitive buildings such as hospitals, schools, and apartment complexes.

The 6 inch x 4 inch Cast Iron Reducing Bushing is a trusted solution for system designers and contractors requiring dimensional accuracy, strength, and acoustic benefits. Specify this fitting for your next installation where durability and compliance are non-negotiable.