Nibco I177150 Dwv Plug 1-1/4 Inch Mnpt Abs

Product Description

The NIBCO I177150 is an ABS plastic DWV plug designed to close off 1-1/4 inch drain, waste, and vent piping during pressure testing, rough-in inspection, or permanent capping of unused branch lines. It features a male NPT (MNPT) end connection that threads directly into a female-threaded fitting or pipe opening. The ABS construction handles a working temperature range of -40 degrees F to 180 degrees F, making it suited for standard residential and light commercial DWV applications. Plumbers and pipefitters install this plug as part of ABS DWV system assemblies.

This plug is used in residential and light commercial drain, waste, and vent piping systems constructed with ABS pipe and fittings. Common applications include capping open test ports after DWV pressure or smoke testing, sealing off stub-outs on unused fixture connections, and closing branch lines during phased construction. The 1-1/4 inch size fits branch lines typically serving lavatories, utility sinks, and similar fixtures.

Key Features

• 1-1/4 inch MNPT connection threads into standard female NPT DWV fittings
• ABS construction rated from -40 degrees F to 180 degrees F
• Lightweight at 0.03 pounds, minimizing added load on branch lines
• ISO 9001:2008 manufactured under a certified quality management system
• Single-piece plug design with no moving parts for reliable sealing

Compatibility

Designed as an OEM-style replacement and standard fitting for ABS DWV piping systems using 1-1/4 inch female NPT threaded connections.

Installation Notes

Installation is performed by licensed plumbers in accordance with applicable plumbing codes such as the IPC or UPC. Shut off water supply and verify the line is depressurized before installing or removing any DWV plug. Hand-tighten first, then use a strap wrench or pipe wrench for final snugging — do not overtighten ABS threaded fittings, as the material can crack under excessive torque. Confirm thread engagement is complete before conducting any line pressure or smoke test.