Parker 318P-4N Nylon Pipe Plug 1/4 in Mpt White

Product Description

The PARKER 318P-4N is a 1/4 inch nylon plastic pipe plug designed to seal male pipe thread (MPT) end connections in fluid and gas distribution systems. Molded from white nylon, this plug offers lightweight corrosion resistance and meets FDA and NSF-51 standards, making it suitable for use in potable water and food-contact applications. It installs directly into a 1/4 inch female pipe thread port to cap off unused outlets, isolate a line segment, or provide a clean pressure-tight seal during system service. Plumbers, HVAC technicians, and pipe fitters keep these plugs on hand for routine maintenance, system modifications, and new installations alike.

This plug is well suited for residential and light commercial plumbing, water treatment, food and beverage equipment, and similar piped systems where a compact, corrosion-resistant MPT fitting is required. Its nylon construction makes it a practical choice in environments where metal plugs could cause galvanic corrosion or where weight and chemical compatibility are considerations. Typical applications include capping branch tees, manifold ports, and filter housings during service or pressure testing.

Key Features

• 1/4 inch male pipe thread (MPT) connection seals female NPT ports directly
• Nylon construction resists corrosion and is lightweight compared to brass or steel alternatives
• White color allows quick visual identification in multi-port assemblies
• FDA and NSF-51 listed for use in potable water and food-contact piping systems
• Compact form factor fits tight spaces in manifolds and filter housings

Compatibility

Designed as an OEM-style replacement or service fitting for 1/4 inch female NPT ports in residential and light commercial plumbing, water treatment, and food-contact fluid systems.

Installation Notes

Installation is performed by licensed plumbers or qualified pipe fitters. Shut off system pressure and depressurize the line before installing or removing any pipe plug. Apply thread sealant tape or compound appropriate for nylon fittings and the media being conveyed. Do not overtighten nylon fittings, as the material can crack under excessive torque.