4 inch PVC DWV Long Sweep 90 Degree Elbow Plastic x Plastic

4” PVC Schedule 40 Long Sweep 90° Elbow – DWV Fitting for Directional Transitions

The 4 inch PVC long sweep 90-degree elbow is designed for use in drainage, waste, and vent (DWV) systems where a smooth directional change is required. The extended sweep radius reduces flow resistance, minimizes pressure loss, and supports effective drainage in gravity-fed piping networks.

Manufactured from rigid polyvinyl chloride (PVC) in accordance with ASTM D2665 and molded from Type I, Grade I PVC (Cell Class 12454 per ASTM D1784), this fitting features socket ends for solvent-welded connections to Schedule 40 DWV pipe. It is suitable for above-ground installations in residential, commercial, and institutional plumbing systems.

Technical Specifications

• Nominal Size: 4 inches
• Angle: 90 degrees (long sweep radius)
• Connection Type: Slip x Slip (solvent weld)
• Material: PVC Type I, Cell Class 12454
• Compliance: ASTM D2665, D3311; NSF-certified for DWV applications

Performance Features

• ✅ Long Sweep Design – Facilitates efficient directional changes by reducing turbulence and improving flow continuity
• ✅ Corrosion-Resistant Material – Inert to common chemical agents found in domestic and commercial waste streams
• ✅ Solvent Weld Joint – Compatible with standard primer and cement for secure, leak-resistant bonding
• ✅ Schedule 40 System Integration – Matches pipe dimensions and wall thickness for uniform installations

Installation Guidance

Use approved solvent cement and primer for Schedule 40 PVC DWV systems. Ensure all pipe ends are cut square, deburred, and cleaned prior to assembly. Proper alignment during curing is critical for maintaining system slope and flow efficiency. Not rated for pressurized applications or use with hot water lines.

Application Scenarios

Typically installed in horizontal drainage lines where gradual changes in direction are required, such as in main house drains, building sewers, or branch line offsets. The long sweep profile assists in maintaining code-compliant slope and flow velocities, especially in high-demand systems subject to solid or grease-bearing waste.

Engineering Note

Long sweep fittings are specified over standard 90° elbows in many plumbing codes for horizontal to horizontal transitions to reduce the risk of blockage and enable easier rodding or system maintenance. Their geometry improves hydraulic performance compared to tighter radius elbows.

The 4” PVC Schedule 40 long sweep 90-degree elbow provides code-compliant, flow-optimized directional transitions in DWV systems, supporting reliable drainage with reduced maintenance demands.