Sigma 811038710 Malleable Iron Reducing Tee 3/4x1/2x3/4 150lb

Product Description

The SIGMA 811038710 is a FIG 3105R reducing tee fitting designed for threaded pipe systems in plumbing, HVAC, fire protection, and industrial piping applications. Manufactured from malleable iron with a galvanized finish, this fitting provides a branch outlet at a reduced diameter while maintaining flow continuity in the run. It carries a 150 lb pressure rating and uses female national pipe taper (FNPT) threads on all three ports. The galvanized coating resists corrosion in wet or exposed environments. Licensed plumbers and pipefitters install this fitting as part of new construction or retrofit piping systems requiring a directional branch with a size reduction at the branch or run outlet.

This reducing tee is suited for residential and commercial piping applications where a 3/4 inch run connects to a 1/2 inch branch. Common use cases include domestic water distribution, gas piping within code-permitted configurations, compressed air lines, and hydronic heating systems. The FNPT thread pattern conforms to standard pipe thread specifications, making it compatible with standard threaded pipe and fittings of the same nominal size and thread form.

Key Features

• Reducing tee configuration: 3/4 x 1/2 x 3/4 inches nominal for in-line branch reduction
• 150 lb pressure-rated malleable iron construction
• Galvanized finish for corrosion resistance in wet or exposed installations
• FNPT threads on all three ports for standard threaded pipe connections
• FIG 3105R pattern — a widely recognized reducing tee configuration in trade piping work

Compatibility

Designed as an OEM-style threaded fitting replacement or new-installation component for 3/4 x 1/2 x 3/4 inch nominal FNPT threaded pipe systems rated to 150 lb service class.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing or mechanical codes, including IPC and IFGC where relevant. Shut off and depressurize the pipe system completely before cutting in or replacing any threaded fitting. Apply appropriate thread sealant or PTFE tape to male threads before assembly, and tighten to proper engagement without over-torquing malleable iron threads. Inspect the galvanized coating for damage after installation if the fitting will be exposed to standing water or buried conditions.

Technical Specifications

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

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811038710