Parker 318P-2PP Polypropylene Pipe Plug 1/8 Inch Mpt

Product Description

The PARKER 318P-2PP is a 1/8 inch polypropylene pipe plug designed to seal threaded pipe openings in fluid handling, plumbing, and process piping systems. Constructed from black polypropylene, this plug features a male pipe thread (MPT) end connection for direct installation into female-threaded ports and fittings. It is rated for service from 10 degrees F to 220 degrees F, making it suitable for a range of liquid and low-pressure applications. The plug meets FDA and NSF-51 standards, which qualifies it for use in food-contact and potable water environments. Plumbers, pipefitters, and process technicians install this type of plug to cap unused ports, isolate branch lines, or pressure-test sections of piping.

This plug is commonly used in residential and light commercial plumbing, irrigation systems, chemical distribution lines, and food processing equipment where a corrosion-resistant, non-metallic plug is preferred over brass or steel alternatives. The 1/8 inch MPT size fits standard 1/8 inch female NPT ports found on manifolds, valves, pumps, and pipe fittings. Its polypropylene construction resists many common chemicals and will not corrode in wet environments, making it a practical choice for both permanent sealing and temporary capping during system testing.

Key Features

• 1/8 inch MPT end connection for direct thread installation into female NPT ports
• Polypropylene construction provides corrosion resistance and chemical compatibility
• Rated for temperatures from 10 degrees F to 220 degrees F
• Meets FDA and NSF-51 standards for food-contact and potable water applications
• Black color provides easy visual identification in mixed-material piping systems
• Lightweight at 0.026 pounds, minimizing added load on threaded connections

Compatibility

Designed as an OEM-style replacement or standard-stock pipe plug for any system with a 1/8 inch female NPT port requiring a non-metallic threaded seal.

Installation Notes

Installation is performed by plumbers or pipefitters as part of routine system assembly or maintenance. Depressurize and drain the affected line before removing or installing any threaded plug. Apply a compatible thread sealant tape or compound to the MPT threads before installation to ensure a leak-free seal; do not overtighten polypropylene fittings as they can crack under excessive torque. Follow applicable IPC or local plumbing code requirements when sealing potable water or food-grade system ports.