Nibco I177370P Dwv Plug 3-1/2 Inch Mnpt Abs

Product Description

The NIBCO I177370P is a drain, waste, and vent (DWV) plug fitting manufactured from acrylonitrile butadiene styrene (ABS) plastic. It accepts a 3-1/2-inch male iron pipe thread (MIPT/MNPT) connection and is used to cap or close off a DWV line during rough-in, inspection, or system service. Rated for temperatures from -40 degrees F to 180 degrees F, this fitting holds up to the thermal demands typical of residential and light commercial drain systems. Plumbers and pipefitters install this part when blanking off an open DWV branch or pressure-testing a drainage system before final connection.

This plug is suited for residential and light commercial plumbing applications where ABS DWV piping is installed. Common scenarios include capping a stack cleanout, closing an unused branch during phased construction, or isolating a section of drain line for inspection. The 3-1/2-inch MNPT size fits standard threaded DWV fittings of the same nominal diameter. It is not rated for pressure supply lines or potable water service.

Key Features

• 3-1/2-inch MNPT connection for direct threaded engagement on DWV fittings
• ABS construction resists corrosion and common drain-line chemicals
• Operating temperature range of -40 degrees F to 180 degrees F
• Manufactured under ISO 9001:2008 quality management standards
• Compact, lightweight design at 0.2 pounds

Compatibility

Designed as an OEM-style replacement or standard component for ABS DWV piping systems using 3-1/2-inch MNPT threaded fittings in residential and light commercial drain, waste, and vent applications.

Installation Notes

Installation is performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local codes. Shut off flow to the affected drain line and ensure the pipe is clear before threading the plug into place. Use thread sealant tape rated for plastic fittings and avoid over-tightening, which can crack ABS threads. Do not use this plug on pressurized supply lines or applications exceeding the rated temperature range.