Sigma 811031210 Straight Pipe Tee 3 Inch Fnpt 150 Lb Galvanized

Product Description

The SIGMA 811031210 is a FIG 3105 straight pipe tee rated at 150 lb and designed for use in threaded piping systems requiring a full three-way branch connection. Built from galvanized malleable iron, this fitting provides corrosion resistance suitable for water, air, and general industrial service. All three ports feature female National Pipe Taper (FNPT) threads at a nominal 3-inch size. Licensed plumbers and pipefitters install this class of fitting in both new construction and retrofit applications where a branch takeoff is required in a straight run of pipe.

This fitting is suited for residential and commercial plumbing, HVAC piping, compressed air distribution, and general mechanical systems. The 3-inch nominal size handles moderate to large flow lines where a threaded branch connection is required. The galvanized finish extends service life in environments with incidental moisture exposure, making it a common choice in mechanical rooms, utility spaces, and overhead piping runs.

Key Features

• 150 lb pressure class rated for threaded iron pipe service
• Galvanized malleable iron construction for corrosion resistance
• FNPT threads on all three ports for standard threaded pipe connection
• 3-inch nominal size for larger-diameter piping systems
• FIG 3105 straight tee geometry provides equal inline and branch port sizing

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3-inch nominal threaded iron pipe systems using 150 lb class malleable iron fittings.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter following applicable IPC or local mechanical code requirements. Apply thread sealant or PTFE tape to all male threads before assembly and tighten to a proper engagement depth without overtightening, which can crack the fitting. Shut off and depressurize the piping system fully before removing any existing fitting or making connections. Do not use this fitting beyond its rated pressure class or with fluids incompatible with galvanized iron.

Technical Specifications

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

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811031210