Bk 521-807BG Malleable Black Iron Pipe Plug 1-1/2 in

Product Description

The BK 521-807BG is a 1-1/2 inch malleable black iron pipe plug designed to seal threaded pipe ends in plumbing, HVAC, gas, and industrial piping systems. Cast from malleable iron with a black finish, this plug meets ANSI/ASTM A-197 material standards and ANSI/ASME B16.14 and B16.39 dimensional standards. Threads conform to ANSI B1.20.1 for consistent fit with standard NPT fittings. Each unit is individually flag tagged and 100 percent inspected and quality tested before leaving the factory. Plumbers, pipefitters, and HVAC technicians use this plug to cap off unused branch openings, pressure-test piping runs, or permanently close dead-end lines.

This pipe plug is suited for residential and light commercial applications involving black iron or steel pipe assemblies. It is commonly installed in gas distribution piping, steam systems, hydronic heating systems, and general plumbing distribution lines where a secure, pressure-rated threaded closure is needed. At 0.434 pounds, it is a single-piece, solid-body fitting sold individually.

Key Features

• Malleable black iron construction meets ANSI/ASTM A-197 material specification
• Dimensional compliance with ANSI/ASME B16.14 and B16.39
• NPT threads conform to ANSI B1.20.1 for standard pipe compatibility
• 100 percent individually inspected and quality tested
• Flag tagged individually for easy identification at the job site
• Solid-body design suitable for sealing unused pipe openings under pressure

Compatibility

Designed as an OEM-style replacement and standard fitting for 1-1/2 inch NPT threaded black iron or steel pipe systems in plumbing, HVAC, and gas piping applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter following applicable local codes, IFGC requirements for gas piping, or IPC guidelines for plumbing systems. Shut off and depressurize the line before installation. Apply an appropriate thread sealant or PTFE tape rated for the intended service before threading the plug into the fitting. Do not overtighten, as malleable iron fittings can crack under excessive torque.

Technical Specifications

• Material: Malleable Black Iron
• Size: 1-1/2 inches
• Thread Standard: ANSI B1.20.1 (NPT)
• Material Standard: ANSI/ASTM A-197
• Dimensional Standard: ANSI/ASME B16.14, B16.39
• Weight: 0.434 pounds
• Sold As: Each

Standard Information

• Brand: BK
• Manufacturer Part Number: 521-807BG