4 inch Proflex Coupling Connects Cast Iron to PVC, Steel, Extra Heavy Cast Iron

3000-44 Fernco ProFlex Shielded Coupling – For Secure Cast Iron to PVC Transitions

The 3000-44 ProFlex Shielded Coupling is engineered for consistent, high-integrity pipe transitions between 4-inch cast iron and 4-inch PVC piping systems. Its stainless steel shield and molded gasket design enable uniform compression across the joint, reducing deflection and maintaining alignment under load.

Designed for use in above- and below-grade DWV systems, this coupling complies with ASTM C1460 and is approved for use in code-regulated mechanical and plumbing applications. The ProFlex coupling’s banded shield configuration supports shear load resistance, making it suitable for mission-critical connections in new construction and retrofit work.

Key Features

• ✅ Shear Band Support Stainless steel clamp bands minimize movement and maintain structural integrity at the joint.
• ✅ Code-Compliant Materials EPDM rubber and 300-series stainless steel components ensure corrosion resistance and code adherence.
• ✅ Cross-Material Compatibility Provides a reliable joint between hubless cast iron and Schedule 40 PVC.
• ✅ Leak Mitigation Gasket geometry and torque-balanced clamps ensure watertight and airtight seals under variable pressure conditions.
• ✅ ASTM Certified Manufactured in compliance with ASTM C1460 for shielded transition couplings.

Typical Applications

Used in drainage, waste, and vent (DWV) systems where a dissimilar material transition is required. Frequently installed in multi-unit residential construction, commercial tenant improvements, and repipe scenarios where cast iron infrastructure is being extended or repaired using PVC components.

Specification Note

3000-series ProFlex couplings are approved for direct-burial and in-wall installations. Ensure torque is applied per manufacturer specifications using a calibrated torque wrench for code-compliant assembly (60 in-lbs recommended).

Installation Requirements

Installation should follow local code requirements and standard mechanical joining procedures. Compatible with no-hub cast iron soil pipe and plastic DWV piping. All components must be clean and properly aligned before tightening. Do not substitute this shielded coupling for unshielded options where code prohibits.

Engineered for Performance and Regulatory Compliance

The Fernco 3000-44 ProFlex coupling is a professional-grade solution built for reliable, long-term performance in critical plumbing systems. It ensures mechanical strength, leak resistance, and conformance with modern construction codes in both residential and commercial projects.