Sigma 811030212 Fig 3105 Straight Pipe Tee 1 in Fnpt 150 Lb

Product Description

The SIGMA 811030212 is a FIG 3105 straight pipe tee designed for threaded pipe assemblies in plumbing, HVAC, and general industrial piping systems. This fitting features a 1-inch nominal size with female national pipe taper (FNPT) end connections on all three ports. Constructed from malleable iron with a galvanized finish, it carries a 150 lb pressure class rating. The galvanized coating provides corrosion resistance in wet and exposed environments. Licensed plumbers and pipefitters install this type of fitting when branching a run of threaded pipe in domestic water, gas distribution, compressed air, or hydronic heating applications.

This straight tee is suited for residential and light commercial piping installations where a branch takeoff is needed at the same nominal pipe size as the main run. The FNPT threads on all outlets accept standard NPT male-threaded pipe or fittings. Typical applications include water supply lines, low-pressure gas piping, steam systems rated within the 150 lb class, and compressed air distribution headers. The galvanized malleable iron construction makes it appropriate for exposed or semi-exposed installations where raw black iron would be susceptible to surface rust.

Key Features

• 1-inch nominal size with FNPT connections on all three ports
• 150 lb pressure class malleable iron construction
• Galvanized finish for corrosion resistance in wet or exposed environments
• Straight tee configuration — branch and run at equal nominal size
• FIG 3105 pattern fitting for standard threaded pipe systems

Compatibility

Designed as an OEM-style replacement and standard trade fitting for 1-inch nominal threaded pipe systems using NPT connections 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 or IFGC depending on the fluid service. Shut off and depressurize the pipe system completely before disassembling any threaded connections. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly, and tighten to a snug fit using pipe wrenches — do not overtighten malleable iron fittings. Inspect the galvanized threads for damage before installation to ensure a leak-free seal.

Technical Specifications

• Nominal Size: 1 inch
• End Style: FNPT (Female National Pipe Taper)
• Pressure Class: 150 lb
• Material: Malleable Iron
• Finish: Galvanized
• Figure Number: FIG 3105
• Configuration: Straight Tee

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811030212