Sigma 811041409 Malleable Iron Galvanized Reducing Tee 150 Lb

Product Description

The SIGMA 811041409 is a FIG 3105R malleable iron reducing tee with a galvanized finish, designed for threaded pipe assemblies in low-pressure gas, water, and general plumbing distribution systems. The fitting connects nominal 1-inch run pipe to a 1/2-inch outlet and a 3/4-inch branch, all with female NPT (FNPT) threads. Rated at 150 lb, it is built for standard pressure service in commercial and residential piping work. The galvanized coating provides corrosion resistance for extended service life in wet or humid environments. Licensed plumbers and pipefitters are the typical installers of this type of fitting.

This reducing tee is used wherever a threaded piping system requires a change in line size or a branch takeoff from a main run. Common applications include water distribution, hydronic heating supply and return lines, compressed air systems, and general industrial pipe assemblies. The FNPT end style accepts standard NPT-threaded pipe and nipples on all three ports. It is suited for both new construction rough-in and retrofit or repair work in mechanical rooms, utility spaces, and similar installations.

Key Features

• Reducing tee configuration: 1 inch run x 1/2 inch outlet x 3/4 inch branch
• Female NPT (FNPT) threads on all three ports for standard threaded pipe compatibility
• 150 lb pressure rating for standard service applications
• Malleable iron construction for strength and impact resistance
• Galvanized finish for corrosion resistance in wet environments

Compatibility

Designed as an OEM-style replacement or standard-stock fitting for 150 lb class malleable iron threaded piping systems using nominal 1-inch, 3/4-inch, and 1/2-inch NPT pipe.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local mechanical and plumbing codes. Shut off and depressurize the piping system completely before disassembling any threaded connections. Apply an approved pipe thread sealant or PTFE tape to male threads before assembly and tighten to a snug, leak-free fit using a pipe wrench. Do not over-torque malleable iron fittings, as the material is strong but not ductile in the same way as wrought fittings.

Technical Specifications

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

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811041409