Sigma 811028018 Malleable Iron Street Elbow 1-1/2 in 150 Lb

Product Description

The SIGMA 811028018 is a galvanized malleable iron street elbow rated at 150 lb, designed for threaded piping assemblies in plumbing and mechanical systems. The street configuration combines a male NPT (MNPT) inlet with a female NPT (FNPT) outlet in a single compact fitting, eliminating the need for a separate nipple when making a 90-degree directional change. At 1-1/2 inches nominal pipe size, this fitting is commonly found in low-pressure water, steam, and gas distribution lines. Licensed plumbers and pipefitters install this type of fitting on commercial and residential piping systems where a close-quarter turn is required and space is limited.

This street elbow is suited for use in residential and light commercial plumbing, gas distribution, and mechanical piping systems. The galvanized finish provides corrosion resistance in exposed or moderately humid environments. Its 150 lb pressure class makes it appropriate for general-service low-pressure applications. The MNPT x FNPT end style allows it to thread directly onto a pipe end or fitting without an intermediate nipple, making it a practical choice for tight installations where reducing overall assembly length matters.

Key Features

• Street elbow configuration: MNPT x FNPT for direct pipe-to-fitting connections
• 1-1/2 inch nominal pipe size for standard threaded piping systems
• 150 lb pressure class suitable for general-service low-pressure water, steam, and gas lines
• Galvanized malleable iron construction provides corrosion resistance and impact toughness
• Compact design reduces overall assembly length compared to standard elbow plus nipple combinations

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-1/2 inch nominal threaded piping systems using standard NPT connections in low-pressure plumbing and mechanical applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off and depressurize the piping system fully before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly. Do not over-tighten; use a pipe wrench with a backup wrench on adjacent fittings to prevent stress on the piping system.

Technical Specifications

• Nominal Pipe Size: 1-1/2 inches
• End Style: MNPT x FNPT
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Galvanized
• Figure Number: 3104

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811028018