Sigma 811031012 Straight Pipe Tee 2-1/2 in Fnpt 150 Lb Galvanized

Product Description

The SIGMA 811031012 is a FIG 3105 straight pipe tee rated for 150 lb service, manufactured from galvanized malleable iron. This fitting connects three sections of pipe at a 90-degree branch in a straight-run configuration, making it a standard workhorse in low-pressure threaded piping systems. All three ports use female National Pipe Taper (FNPT) threads at a 2-1/2 inch nominal size. The galvanized finish provides corrosion resistance for both indoor and outdoor installations. Plumbers and pipefitters install this fitting as part of complete threaded piping assemblies where a branch takeoff is required without changing pipe diameter.

This tee is suited for residential and light commercial piping applications including water supply, compressed air distribution, and general industrial process lines operating within 150 lb pressure class limits. The FNPT end style allows direct makeup with standard tapered pipe threads using appropriate thread sealant or PTFE tape. It is commonly installed in above-ground mechanical rooms, utility spaces, and equipment rooms where galvanized malleable iron fittings are specified for corrosion resistance and durability under moderate service conditions.

Key Features

• 2-1/2 inch nominal size with FNPT threads on all three ports for standard threaded pipe compatibility
• 150 lb pressure class rating suitable for low-to-moderate pressure piping systems
• Malleable iron construction provides strength and impact resistance over cast iron alternatives
• Hot-dip galvanized finish adds corrosion protection for wet or humid environments
• Straight tee configuration maintains full pipe diameter through run and branch

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 2-1/2 inch nominal threaded piping systems using 150 lb malleable iron galvanized fittings per standard pipe configurations.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable IPC and IFGC guidelines for threaded piping systems. Shut off and depressurize the piping system completely before disassembling any existing fittings or making new connections. Apply thread sealant or PTFE tape to male threads before makeup to ensure a leak-free joint. Do not over-torque threaded connections, as malleable iron fittings can crack if over-stressed.

Technical Specifications

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

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811031012