Ndl Industries NIPPLE11/2X31/2 Black Steel Pipe Nipple Sch 40

Product Description

The NDL INDUSTRIES NIPPLE11/2X31/2 is a black steel pipe nipple rated at Schedule 40 and sized at 1-1/2 inches nominal diameter by 3-1/2 inches in length. It features a male connection on both ends and carries a wall thickness of 0.145 inches. This fitting is a standard close-to-short nipple used in threaded pipe assemblies across plumbing, HVAC, gas distribution, and mechanical piping systems. Licensed plumbers, pipefitters, and mechanical contractors install this type of fitting when connecting threaded pipe runs, valves, unions, or other threaded components in low-pressure distribution lines.

This nipple is suited for residential and light commercial applications where Schedule 40 black steel pipe is specified. Common install scenarios include natural gas supply lines, steam systems, compressed air distribution, and hydronic heating connections. The 1-1/2 inch nominal size is a frequently specified diameter in branch and main line configurations. Its black steel construction makes it appropriate for gas and non-potable water service where galvanized or stainless material is not required.

Key Features

• Schedule 40 wall rating with 0.145 inch wall thickness for standard-pressure threaded service
• 1-1/2 inch nominal diameter with male threaded ends on both sides
• 3-1/2 inch overall length suits tight-clearance connections and short offsets
• Black steel construction compatible with gas, steam, compressed air, and hydronic systems
• Standard NPT thread form for interchangeability with common fittings and valves

Compatibility

Designed as an OEM-style replacement and standard-use fitting for Schedule 40 threaded black steel pipe assemblies in residential and commercial mechanical systems.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable codes such as the IPC or IFGC. Shut off and depressurize the line before disassembling any threaded joint. Apply approved thread sealant or PTFE tape to the male threads before making up the joint. Do not overtighten; follow standard trade practice for NPT thread engagement to avoid cracking fittings or stripping threads.

Technical Specifications

• Nominal Diameter: 1-1/2 inches
• Overall Length: 3-1/2 inches
• Wall Thickness: 0.145 inches
• Schedule Rating: SCH 40
• Connection Type: Male threaded (both ends)
• Material: Steel
• Finish: Black

Standard Information

• Brand: NDL INDUSTRIES
• Manufacturer Part Number: NIPPLE11/2X31/2