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

Product Description

The ASC Engineered Solutions 1B.BU is a 1-1/4 inch malleable iron pipe union with a brass-to-iron seat mating surface, rated for 150 lb service. Unions allow piping systems to be disconnected and reconnected without disturbing adjacent pipe runs, making them a standard component in gas, steam, and water distribution systems. The brass seat provides a reliable metal-to-metal seal against the iron ground joint, reducing the risk of leakage over repeated assembly cycles. This fitting is finished in black and is domestically manufactured, which is relevant for projects governed by Buy American provisions. Licensed plumbers and pipefitters install this type of union on threaded iron pipe systems in both residential and commercial applications.

This union is suited for use in 1-1/4 inch threaded iron piping systems carrying gas, steam, or water within the 150 lb pressure class. Typical installation scenarios include branch takeoffs, equipment connections, and service isolation points where future disassembly is anticipated. The black finish is standard for gas piping and low-pressure steam systems. The fitting accepts standard NPT threaded pipe and connects inline between two fixed pipe runs.

Key Features

• 1-1/4 inch nominal pipe size for NPT threaded connections
• 150 lb pressure class rating for gas, steam, and water service
• Brass-to-iron ground joint seat provides a durable metal-to-metal seal
• Malleable iron body with black finish — standard for gas and steam piping
• Domestically manufactured construction
• Three-piece union design allows inline disconnection without disturbing adjacent pipe

Compatibility

Designed as an OEM-style threaded fitting for 1-1/4 inch NPT iron pipe systems rated at 150 lb, consistent with standard residential and light commercial gas, steam, and water distribution piping.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes, the International Plumbing Code, and the International Fuel Gas Code where gas service is involved. Isolate and depressurize the piping system fully before disassembling or installing the union. Apply an approved thread sealant or PTFE tape to the male NPT threads before assembly; do not apply sealant to the ground joint seat faces. Tighten the union nut to achieve a wrench-tight fit — do not over-torque malleable iron fittings.

Technical Specifications

• Pipe Size: 1-1/4 inches
• Pressure Rating: 150 lb
• Seat Type: Brass x Iron
• Body Material: Malleable Iron
• Finish: Black
• Connection Type: NPT Threaded
• Origin: Domestic

Standard Information

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