Nibco CC03650 Hex Plug 1 in Polypropylene Schedule 80 Mpt

Product Description

The NIBCO CC03650 is a Schedule 80 polypropylene hex plug designed to seal and cap threaded pipe ends in industrial and commercial piping systems. Configured with a Male NPT (MNPT) end connection, this fitting threads directly into female-threaded fittings, valves, or pipe outlets to create a secure, leak-resistant closure. The polypropylene construction offers solid chemical resistance, making it suitable for a wide range of fluid handling applications. At 1 inch nominal size, it fits standard 1-inch NPT female ports. The black coloring is typical of Schedule 80 thermoplastic fittings and provides a quick visual indicator of the heavier-duty Schedule 80 wall thickness.

This hex plug is used in residential, commercial, and light industrial piping installations where a threaded pipe end requires capping or plugging. Common applications include chemical handling lines, irrigation systems, water treatment setups, and industrial process piping where polypropylene's corrosion and chemical resistance is preferred over metal fittings. It is typically installed by licensed plumbers or pipe fitters during system construction, maintenance, or pressure testing procedures.

Key Features

• Schedule 80 wall thickness for added pressure and mechanical durability
• Polypropylene construction offers strong resistance to chemicals and corrosion
• Male NPT (MNPT) thread configuration for direct engagement with female-threaded ports
• 1 inch fitting size fits standard 1-inch NPT female connections
• Hex head design allows installation with standard wrenches for consistent tightening
• Black color identifies Schedule 80 rating at a glance

Compatibility

Designed as an OEM-style replacement or new-installation fitting compatible with standard 1-inch female NPT threaded pipe, fittings, and valves in Schedule 80 thermoplastic piping systems.

Installation Notes

Installation is performed by a licensed plumber or qualified pipe fitter. Depressurize and drain the line completely before removing or installing any threaded pipe plug. Apply an appropriate thread sealant or PTFE tape to the male threads before installation. Hand-tighten first, then use a wrench on the hex head to achieve a snug, leak-free fit without over-torquing, as over-stressing thermoplastic threads can cause cracking.