Nibco CC03850 Hex Plug 3 in Polypropylene Sch 80 Mnpt

Product Description

The NIBCO CC03850 is a 3-inch Schedule 80 polypropylene hex plug designed to seal and cap threaded pipe ends in industrial and commercial piping systems. Constructed from black polypropylene, this hex plug offers solid chemical resistance and is well suited for use in corrosive or high-moisture environments. The male NPT (MNPT) threading allows for straightforward installation into female-threaded fittings, couplings, and pipe bodies. Plumbers, pipefitters, and industrial maintenance technicians install this type of fitting as a permanent or temporary line closure on Schedule 80 thermoplastic piping systems.

The CC03850 is used in residential, commercial, and light industrial piping applications where Schedule 80 thermoplastic fittings are specified. Typical install scenarios include capping branch outlets on chemical distribution lines, process water systems, and irrigation headers. The black polypropylene construction is appropriate for applications requiring resistance to a range of acids, bases, and industrial fluids. This fitting is sold individually and is appropriate for systems requiring a robust, non-metallic threaded plug at a 3-inch pipe size.

Key Features

• Schedule 80 wall rating for higher pressure and impact resistance compared to Schedule 40 fittings
• Black polypropylene construction provides chemical resistance in corrosive piping environments
• MNPT (male national pipe thread) end connection for direct engagement with female-threaded fittings
• Hex head design allows installation and removal with standard pipe wrenches or adjustable wrenches
• 3-inch fitting size for use on larger-diameter thermoplastic pipe systems

Compatibility

Designed as an OEM-style replacement and standard fitting for Schedule 80 thermoplastic piping systems using MNPT threaded connections at 3-inch pipe size.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable IPC or local plumbing code requirements. Depressurize and drain the piping system completely before removing or installing any threaded plug. Apply thread sealant tape or compound rated for use with polypropylene fittings to the male threads before engagement. Do not overtighten, as excessive torque can crack thermoplastic fittings.