Sigma 811030410 Galvanized Pipe Tee 1-1/4 Inch Fnpt 150 Lb

Product Description

The SIGMA 811030410 is a straight pipe tee fitting designed for threaded pipe systems in plumbing, HVAC, and mechanical piping applications. Built to FIG 3105 dimensional standards, this tee is constructed from malleable iron with a galvanized finish that provides corrosion resistance in exposed or moderate-moisture environments. The fitting uses female National Pipe Taper (FNPT) threads on all three ports and carries a 150 lb pressure rating, making it appropriate for low-pressure gas, water, and steam distribution systems. Licensed plumbers and pipefitters install this type of fitting when a branch connection is needed in a straight run of threaded pipe.

This fitting is suited for residential and light commercial piping installations where a 1-1/4 inch nominal threaded branch takeoff is required. Common applications include natural gas distribution piping, domestic water supply lines, compressed air systems, and hydronic heating distribution. The galvanized finish makes it a practical choice in utility spaces, crawlspaces, and mechanical rooms where bare iron fittings would be prone to surface corrosion.

Key Features

• FIG 3105 straight tee configuration with equal-size ports on all three outlets
• 1-1/4 inch nominal FNPT threads on all connections for standard pipe compatibility
• 150 lb pressure-rated malleable iron construction
• Galvanized finish for corrosion resistance in utility and mechanical room environments
• Suitable for gas, water, steam, and compressed air service per applicable codes

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-1/4 inch nominal FNPT threaded pipe systems rated at 150 lb class.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable codes such as the IPC, IFGC, or local mechanical code. Shut off and depressurize the pipe system fully before removing or installing any threaded fittings. Apply an approved thread sealant or PTFE tape to male threads before assembly. Do not over-tighten, as malleable iron fittings can crack under excessive torque.

Technical Specifications

• Nominal Size: 1-1/4 inches
• End Style: FNPT (Female National Pipe Taper) all three ports
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Galvanized
• Figure Number: FIG 3105
• Fitting Type: Straight Pipe Tee

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811030410