Asc 8700163051 Malleable Black Iron Union 1 Inch

Product Description

The ASC ENGINEERED SOLUTIONS 8700163051 is a 1-inch ground joint union fitting manufactured from malleable black iron. It is used to join two sections of threaded black iron pipe in a way that allows future disconnection without cutting or unthreading the line. The black finish provides baseline rust resistance for indoor and dry-environment installations. National Pipe Threads (NPT) on both end connections create tighter seals than straight-thread designs. This fitting is sold individually and is installed by licensed plumbers and pipefitters working on gas distribution, steam, and hydronic systems.

This union is suited for residential and light commercial applications where a removable pipe connection is required. Typical scenarios include boiler room piping, gas appliance rough-in, and steam heating distribution lines. The ground joint seat design ensures a metal-to-metal seal at the union face, making it a reliable choice for systems where pipe sections must occasionally be broken apart for service or equipment replacement.

Key Features

• Malleable black iron construction for strength and machinability under field conditions
• Ground joint seat provides a metal-to-metal seal at the union face
• National Pipe Threads (NPT) for tighter seals compared to straight-thread connections
• Black finish for corrosion resistance in dry and indoor environments
• Compliant with ANSI B-16.39, ANSI B-16.14, and ANSI B-2.1 dimensional and thread standards
• Meets Federal Specification WW-U-531C for malleable iron unions Class 150

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-inch NPT black iron pipe systems, including gas, steam, and hydronic heating applications conforming to Class 150 malleable iron union specifications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes and the IFGC or IPC as appropriate for the service type. Shut off and depressurize the line completely before breaking or making any union connection. Apply thread sealant or PTFE tape rated for the intended service to all NPT connections before assembly. Do not overtighten the union nut beyond hand-tight plus a controlled turn, as excessive force can damage the ground joint seat.

Technical Specifications

• Pipe Size: 1 inch
• Material: Malleable black iron
• Finish: Black
• Thread Type: National Pipe Thread (NPT)
• Pressure Class: Class 150
• Weight: 1.12 pounds
• Standards: ANSI B-16.39, ANSI B-16.14, ANSI B-2.1, Fed. Spec. WW-U-531C, Fed. Spec. WW-P-471-B
• Sold As: Each

Standard Information

• Brand: ASC ENGINEERED SOLUTIONS
• Manufacturer Part Number: 8700163051