Asc Engineered Solutions 1B.NU Pipe Union 1-1/4 in 150 Lb

Product Description

The ASC Engineered Solutions 1B.NU is a 1-1/4 inch malleable iron pipe union rated at 150 lb, featuring a brass-to-iron seat configuration and a galvanized finish for corrosion resistance. Unions allow piping runs to be disconnected and reconnected without cutting or threading new pipe ends, making them a standard component in gas, water, and steam distribution systems. The galvanized coating extends service life in damp or exposed mechanical spaces. Licensed plumbers and pipefitters install this fitting in both new construction and retrofit work where future serviceability of the line is required.

This union is suited for residential and light commercial piping applications where malleable iron fittings are specified. Typical installations include gas supply lines, hot and cold water distribution, and low-pressure steam systems. The 150 lb pressure rating makes it appropriate for standard service conditions found in most mechanical rooms, boiler rooms, and utility spaces. The domestic designation indicates U.S. manufacture, which is relevant where project specifications require domestic-origin iron fittings.

Key Features

• 1-1/4 inch nominal pipe size fits standard threaded iron pipe
• 150 lb pressure rating suitable for gas, water, and low-pressure steam service
• Brass-to-iron seat design provides a reliable metal-to-metal seal at the union joint
• Malleable iron construction resists impact and vibration better than cast iron
• Galvanized finish provides corrosion protection in wet or exposed environments
• Domestically manufactured fitting for projects with domestic-origin requirements

Compatibility

Designed as an OEM-style replacement or new-installation fitting for standard 1-1/4 inch NPT threaded iron pipe systems rated at 150 lb service class.

Installation Notes

Installation is performed by a licensed plumber or pipefitter in accordance with applicable local plumbing and mechanical codes. Shut off and depressurize the line completely before disassembling or installing any union fitting. Apply appropriate thread sealant or PTFE tape to all male NPT threads before making up the joint. Tighten the union nut to a snug, leak-free fit using pipe wrenches — do not over-tighten the union ring nut, as this can damage the seat surfaces.

Technical Specifications

• Nominal Pipe Size: 1-1/4 inches
• Pressure Rating: 150 lb
• Seat Material: Brass x Iron
• Body Material: Malleable Iron
• Finish: Galvanized
• Origin: Domestic

Standard Information

• Brand: ASC Engineered Solutions
• Manufacturer Part Number: 1B.NU