Sigma 810010009 90 Deg Reducing Elbow 1-1/2x3/4 Fnpt 150lb

Product Description

The SIGMA 810010009 is a FIG 3101R 90-degree reducing pipe elbow rated at 150 lb, manufactured from malleable iron with a black oxide finish. It transitions from a 1-1/2 inch nominal inlet to a 3/4 inch nominal outlet using female NPT (FNPT) threads on both ends. This fitting is designed for use in low-pressure piping systems where a directional change and pipe reduction are needed at a single connection point. Plumbers and pipefitters install this type of elbow in steam, water, gas, and air distribution systems in both residential and light commercial applications.

This reducing elbow is suited for threaded pipe assemblies in mechanical rooms, utility spaces, and industrial piping runs. The 90-degree turn makes it appropriate for routing pipe around obstructions or transitioning between pipe planes while simultaneously stepping down pipe diameter. The FNPT end style accepts standard NPT-threaded pipe on both the larger and smaller ends, making it compatible with conventional threaded iron pipe fittings throughout the system.

Key Features

• 90-degree elbow with integral reduction — combines direction change and pipe size step-down in one fitting
• 1-1/2 inch x 3/4 inch nominal size — transitions between two common pipe diameters
• FNPT threads on both ends — accepts standard NPT-threaded pipe without adapters
• 150 lb pressure rating — suitable for low-pressure steam, water, gas, and air service
• Malleable iron construction — provides strength and resistance to impact and vibration
• Black oxide finish — standard coating for corrosion resistance in typical indoor piping environments

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 150 lb class malleable iron threaded piping systems using NPT connections.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and ASME B16.3 standards for malleable iron fittings. Shut off and depressurize the pipe system completely before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the male NPT threads before assembly, and tighten to the fitting manufacturer's standard practice — do not overtighten, as malleable iron threads can crack under excessive torque. Confirm system pressure and fluid compatibility are within the 150 lb pressure class rating before returning the system to service.

Technical Specifications

• Figure Number: FIG 3101R
• Fitting Type: 90-Degree Reducing Elbow
• Nominal Size: 1-1/2 x 3/4 inches
• End Style: FNPT (Female National Pipe Taper) both ends
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Black Oxide

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 810010009