Mission Rubber MR01 88 Clay X Clay Calder Coupling 8 in

Product Description

The MISSION RUBBER MR01 88 is an 8-inch clay-to-clay Calder coupling designed for joining vitrified clay pipe sections in gravity-flow drainage and sewer systems. This coupling provides a flexible yet secure connection between two clay pipe ends, compensating for minor misalignment and ground movement without rigid mechanical failure. It is typically installed by licensed plumbers or sewer contractors during new construction, rehabilitation, or repair of underground drainage infrastructure. At 3.62 pounds, the coupling is manageable for single-technician installation in confined trench conditions.

This coupling is suited for residential and commercial underground sewer and stormwater drain applications where clay pipe is the specified material. Clay-to-clay couplings of this type are commonly used in municipal lateral connections, private sewer laterals, and trenchless rehabilitation scenarios where maintaining the integrity of existing clay pipe runs is required. The Calder-style coupling design accommodates standard clay pipe outside diameters at the 8-inch nominal pipe size.

Key Features

• 8-inch nominal size for clay-to-clay pipe connections
• Calder coupling design provides flexible, shear-resistant joints
• Accommodates minor angular deflection and ground settlement
• Lightweight at 3.62 pounds for ease of handling in trench conditions
• Compatible with vitrified clay pipe used in gravity-flow sewer and drain systems

Compatibility

Designed as an OEM-style replacement or new-installation coupling for 8-inch vitrified clay pipe in gravity-flow underground sewer and drainage systems.

Installation Notes

Installation should be performed by a licensed plumber or sewer contractor in accordance with local plumbing codes and IPC requirements for underground drainage systems. The pipe ends should be clean, free of debris, and properly aligned before seating the coupling. Excavate sufficient trench width to allow full coupling engagement and proper bedding support around the joint. Always verify pipe outside diameter compatibility before installation to ensure a proper seal.

Technical Specifications

• Nominal Pipe Size: 8 inches
• Connection Type: Clay x Clay
• Coupling Style: Calder
• Weight: 3.62 pounds
• UPC: 70288705010

Standard Information

• Brand: MISSION RUBBER
• Manufacturer Part Number: MR01 88