Nibco CN00750 3 in Schedule 80 Polypropylene Adapter Coupling

Product Description

The NIBCO CN00750 is a 3-inch Schedule 80 polypropylene pipe adapter coupling designed for use in industrial and commercial piping systems where chemical resistance and durability are required. This fitting connects female pipe threads on both ends, allowing technicians to join threaded pipe runs or transition between sections with a secure, pressure-rated connection. Schedule 80 wall thickness provides added strength over standard Schedule 40 fittings, making it suitable for higher-pressure or more demanding service environments. Plumbers and pipefitters working with corrosive fluid applications commonly specify polypropylene fittings of this type.

This adapter coupling is suited for use in chemical processing, industrial plumbing, and water treatment piping systems where polypropylene's resistance to acids, bases, and many solvents is an advantage. It is appropriate for both above-ground and in-plant installations where threaded connections are required at a 3-inch pipe size. The FPT x FPT end configuration makes it a straightforward choice when joining two male-threaded pipe ends or when adapting into threaded equipment ports.

Key Features

• Schedule 80 wall thickness for higher pressure ratings compared to Schedule 40 fittings
• Polypropylene construction offers strong resistance to a broad range of chemicals and corrosive fluids
• FPT x FPT end connections accept standard male-threaded pipe on both sides
• 3-inch fitting size suitable for larger-diameter piping runs in commercial and industrial applications
• Lightweight material reduces overall system weight compared to metal fittings

Compatibility

Designed as an OEM-style replacement or new-installation fitting for Schedule 80 polypropylene threaded piping systems at 3-inch pipe size.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter following applicable IPC and local plumbing code requirements. Shut off and depressurize the piping system completely before removing or installing any fittings. Use PTFE thread tape or an approved thread sealant on all male threads before making up the connection; do not overtighten, as polypropylene threads can crack under excessive torque. Inspect threads on mating pipe or fittings for damage before assembly.