Pipeconx PCX56-88RCX Strong Back Coupling 8x8

Product Description

The PIPECONX PCX56-88RCX is an 8-inch by 8-inch strong back cast iron, plastic, and rubber non-shear coupling designed for connecting pipes of matching or transitioning materials in drain, waste, and vent (DWV) systems. The coupling uses stainless steel bands that tighten to a specified torque to create a leak-proof, chemical-resistant connection. Installation requires only a slotted screwdriver or a 5/16-inch nut driver or socket, keeping the process straightforward for plumbing professionals working in residential or commercial applications.

This coupling is suited for underground and above-grade DWV piping where soil conditions, root intrusion, or chemical exposure are concerns. The strong back design adds structural reinforcement to the coupling body, making it appropriate for transitions between cast iron, plastic (PVC or ABS), and rubber pipe in both new construction and repair scenarios. Licensed plumbers and pipefitters install this type of coupling during rough-in work, sewer lateral repairs, and system tie-ins.

Key Features

• Non-shear design prevents gasket displacement during tightening
• Strong back reinforcement adds rigidity to the coupling body
• Stainless steel bands torque to 60 inch-pounds for a leak-proof seal
• Chemical-resistant construction impervious to root intrusion and soil conditions
• Installs with a slotted screwdriver or 5/16-inch nut driver or socket
• Part number, size, and compatible material types are marked directly on the coupling

Compatibility

Designed as an OEM-style universal replacement coupling for 8-inch cast iron, plastic, and rubber DWV pipe connections in residential and commercial plumbing systems.

Installation Notes

Installation must be performed by a licensed plumber in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off flow and relieve any system pressure before cutting into an existing line. Tighten stainless steel bands to 60 inch-pounds using a slotted screwdriver or 5/16-inch nut driver - do not overtighten beyond the specified torque, as this can damage the gasket. Verify pipe ends are clean, deburred, and properly aligned before seating the coupling.