Mission Rubber 804310 Shielded Specialty Coupling 4x2 in

Product Description

The MISSION RUBBER 804310 is a C Series shielded specialty coupling designed to join pipes with a 4-inch nominal size to a 2-inch nominal size in drain, waste, and vent piping systems. The coupling accommodates cast iron pipe on one end and cast iron, plastic, or steel pipe on the other, making it a versatile transition fitting for mixed-material plumbing installations. It is rated for SCH 40 and standard wall pipe, providing a reliable mechanical seal without soldering, threading, or hub connections. Licensed plumbers and pipefitters are the primary installers of this fitting in both new construction and retrofit applications.

This coupling is suited for residential and light commercial drain, waste, and vent systems where pipe material or pipe diameter changes occur within the same run. The 4 x 2 inch nominal sizing is common in stack transitions, closet flange connections, and below-slab piping configurations. Its shielded design provides additional external support and helps maintain alignment across the joint, which is particularly useful when connecting dissimilar pipe materials in tight or below-grade spaces.

Key Features

• Shielded C Series design adds external reinforcement for joint stability
• Accepts cast iron, plastic, and steel pipe on the secondary end for multi-material transitions
• 4 x 2 inch nominal sizing covers common stack and branch transition configurations
• Compatible with SCH 40 and standard wall pipe dimensions
• No-hub mechanical coupling style eliminates need for soldering or threaded connections
• Domestic manufacture

Compatibility

Designed as an OEM-style mechanical coupling for 4 x 2 inch nominal cast iron, plastic, and steel DWV pipe systems rated at SCH 40 and standard wall specifications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable plumbing codes such as the IPC or UPC. Shut off water supply and ensure the pipe run is depressurized and drained before beginning work. Pipe ends should be clean, deburred, and free of debris to ensure a proper seal against the coupling gasket. Torque the band clamps evenly and according to the coupling manufacturer instructions included with the fitting.

Technical Specifications

• Nominal Size: 4 x 2 inches
• End Style: Cast Iron x Cast Iron / Plastic / Steel
• Wall Rating: SCH 40 / STD
• Series: C Series Shielded
• Origin: Domestic

Standard Information

• Brand: MISSION RUBBER
• Manufacturer Part Number: 804310