Aqualine GPLUG-300 Threaded Galvanized Plug 3 Inches

Product Description

The AQUALINE GPLUG-300 is a 3-inch threaded galvanized plug used to cap off or seal threaded pipe openings in plumbing, HVAC, and general piping systems. The galvanized steel construction provides corrosion resistance in wet or humid environments. This plug threads directly into a female-threaded fitting or pipe end to create a secure, pressure-rated closure. It is a standard trade component installed by plumbers, pipefitters, and HVAC technicians during system construction, pressure testing, or temporary service shutoffs.

The GPLUG-300 is suited for residential and light commercial applications where a 3-inch threaded pipe termination requires a sealed end. Common uses include capping branch lines during rough-in, isolating unused outlets on manifolds, and blanking off ports during pressure testing. The threaded galvanized design makes it compatible with standard NPT-threaded steel and iron pipe systems found in water supply, gas distribution, and hydronic heating installations.

Key Features

• 3-inch threaded connection for a secure, leak-resistant seal on female-threaded pipe ends
• Galvanized steel construction resists corrosion in wet and high-humidity environments
• Standard NPT thread pattern for compatibility with common pipe fittings and iron pipe
• Compact, solid plug design suitable for pressure testing and permanent capping applications

Compatibility

Designed as an OEM-style replacement and standard-fit component for 3-inch female NPT-threaded pipe systems in plumbing, HVAC, and general piping applications.

Installation Notes

Installation is performed by licensed plumbers or pipefitters using a pipe wrench sized for 3-inch fittings. Shut off system pressure and drain the line before installing or removing any threaded plug. Apply thread sealant tape or pipe dope to the male threads prior to installation to ensure a leak-free seal. Follow applicable IPC or IFGC code requirements for the specific piping system.

Technical Specifications

• Size: 3 inches
• Connection Type: Threaded (NPT)
• Material: Galvanized Steel
• Weight: 1.77 pounds

Standard Information

• Brand: AQUALINE
• Manufacturer Part Number: GPLUG-300