Asc Engineered Solutions 8700163101 Black Iron Union 1-1/4 in

Product Description

The ASC ENGINEERED SOLUTIONS 8700163101 is a 1-1/4 inch ground joint malleable black iron union designed for threaded pipe assemblies in gas, water, and steam distribution systems. The ground joint design creates a metal-to-metal seal at the union face, while National Pipe Taper threads on both ends form tighter, more reliable seals than straight-thread connections. The black finish provides baseline rust resistance for exposed or indoor piping runs. This fitting is rated Class 150 and conforms to Fed. Spec. WW-U-531C and ANSI B-16.39 for malleable iron unions, making it a code-compliant choice for plumbing and mechanical contractors.

This union is suited for residential and light commercial piping installations where a serviceable, break-apart connection is needed. Common applications include gas supply lines, hydronic heating distribution, and general plumbing rough-in work. The 1-1/4 inch size fits standard Schedule 40 black iron pipe and is typically installed by licensed plumbers or pipefitters when a disconnect point is required for equipment service access.

Key Features

• Ground joint design provides metal-to-metal face seal for reliable shutoff at the union connection
• National Pipe Taper (NPT) threads on both ends for tighter seals than straight-thread alternatives
• Malleable black iron construction — Class 150 rated
• Black finish offers rust resistance for indoor and protected piping applications
• Meets Fed. Spec. WW-U-531C, ANSI B-16.39 (Malleable Iron Unions), ANSI B-16.14 (Dimensions), and ANSI B-2.1 (Pipe Threads)

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-1/4 inch NPT threaded black iron pipe systems in plumbing, gas distribution, and hydronic heating applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with the International Plumbing Code (IPC) or International Fuel Gas Code (IFGC) as applicable. Shut off and depressurize the pipe system fully before disassembly or installation of any union fitting. Apply appropriate pipe thread sealant or tape rated for the service fluid — use only sealants listed for gas service on gas lines. Do not over-tighten the union nut; hand-snug then wrench-tighten to achieve a leak-free joint without stressing the fitting body.

Technical Specifications

• Pipe Size: 1-1/4 inches
• Connection Type: National Pipe Taper (NPT) threads, ground joint face seal
• Material: Malleable iron
• Finish: Black
• Pressure Class: Class 150
• Weight: 1.741 pounds
• Standards: Fed. Spec. WW-U-531C, ANSI B-16.39, ANSI B-16.14, ANSI B-2.1, Fed. Spec. WW-P-471-B
• Sold As: Each

Standard Information

• Brand: ASC ENGINEERED SOLUTIONS
• Manufacturer Part Number: 8700163101