Midland Industries 970812 No-hub Coupling 3 Inch

Product Description

The MIDLAND INDUSTRIES 970812 is a no-hub coupling designed to join cast iron soil pipe and fittings in drain, waste, and vent (DWV) systems. It uses a rubber sleeve and 316 stainless steel hardware to create a leak-resistant, no-hub connection on 3-inch pipe. The coupling handles a working pressure of 4.3 psi and is rated for temperatures from -30 degrees F to 140 degrees F. Licensed plumbers install this fitting as part of new construction or repair work in residential and light commercial DWV piping systems.

This coupling is suited for underground, in-wall, and above-slab DWV installations where no-hub cast iron pipe is used. At 3 inches on both connection ends, it accommodates straight coupling of same-size pipe runs. The unit weighs 0.35 pounds and has a compact profile measuring 4.1 inches in length, making it practical in tight chase and stack configurations. It is commonly installed by plumbers working on soil stacks, horizontal branch lines, and building drains.

Key Features

• 3-inch no-hub connection on both ends for straight inline joining
• 316 stainless steel band and hardware resist corrosion in wet and underground environments
• Rubber sleeve provides a flexible, leak-resistant seal between pipe ends
• Rated for -30 degrees F to 140 degrees F service temperature range
• 4.3 psi working pressure appropriate for gravity-flow DWV applications
• Standard installation torque of 60 inch-pounds for consistent band tightening

Compatibility

Designed as an OEM-style no-hub coupling for 3-inch cast iron no-hub soil pipe and fittings in residential and commercial DWV systems.

Installation Notes

Installation is performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and local authority requirements. Pipe ends should be cut square, deburred, and cleaned before the rubber sleeve and band are positioned. Tighten the stainless steel band to the manufacturer torque specification using a torque-limiting screwdriver or nut driver rated for inch-pound increments. Shut off any active flow in the line and verify the system is depressurized before removing or replacing an existing coupling.