Sigma 811038207 Malleable Iron Reducing Tee 3/4x3/4x1/2 150lb

Product Description

The SIGMA 811038207, also cataloged as FIG 3105R, is a malleable iron reducing tee designed for threaded pipe assemblies in low-pressure piping systems. It features female national pipe taper (FNPT) threads on all three ports, with a run size of 3/4 x 3/4 inches and a reduced branch of 1/2 inch. The galvanized finish provides corrosion resistance for extended service life in demanding environments. Rated at 150 lb, this fitting is suited for water, air, oil, and steam applications where a standard pressure-class threaded connection is required. Licensed plumbers, pipefitters, and mechanical contractors are the typical installers.

This reducing tee is used in residential and light commercial piping systems where a branch line of smaller diameter must be taken off a main run. Common applications include domestic water supply distribution, compressed air lines, low-pressure steam systems, and general industrial fluid transfer. The 3/4 x 3/4 x 1/2 inch configuration is a high-frequency size in both new construction and retrofit work where flow must be split or redirected to a smaller downstream circuit.

Key Features

• Malleable iron construction for strength and impact resistance in threaded piping applications
• Galvanized finish for corrosion protection in wet or humid environments
• 150 lb pressure class suitable for water, air, oil, and steam service
• FNPT threads on all three ports for standard threaded pipe connections
• Reducing branch (3/4 x 3/4 x 1/2 inch) allows transition to smaller pipe size without additional fittings

Compatibility

Designed as an OEM-style replacement or new-installation fitting compatible with standard 3/4 inch and 1/2 inch NPT-threaded malleable iron pipe systems rated at 150 lb pressure class.

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 threaded fittings. Shut off and depressurize the system completely before disassembly or fitting installation. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly, and tighten to hand-tight plus the appropriate number of turns using a pipe wrench — do not overtighten malleable iron fittings as the material can crack under excessive torque. Inspect threads for damage before installation.

Technical Specifications

• Figure Number: FIG 3105R
• Nominal Size: 3/4 x 3/4 x 1/2 inches
• End Style: FNPT (Female National Pipe Taper)
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Galvanized

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811038207