Sigma 811047810 Galvanized Reducing Tee 1.5x0.75x1.5 in 150lb Fnpt

Product Description

The SIGMA 811047810 is a malleable iron galvanized reducing tee fitting designed for threaded pipe assemblies in low-pressure fluid and gas distribution systems. Conforming to the FIG 3105R pattern, it connects a 1-1/2 inch run with a 3/4 inch branch outlet, all three ports terminating in female NPT (FNPT) threads. Rated at 150 lb, this fitting handles standard working pressures found in commercial and industrial plumbing, HVAC hydronic lines, fire protection branch lines, and steam service applications. The hot-dip galvanized finish provides corrosion resistance in exposed or damp environments. Plumbers and pipefitters are the primary installers of this class of fitting.

This reducing tee is suited for residential and light commercial piping systems where a main 1-1/2 inch threaded line requires a reduced 3/4 inch branch takeoff. Typical applications include hydronic heating distribution headers, compressed air supply lines, water service mains, and general industrial process piping. The FNPT end style accepts standard NPT male-threaded pipe and nipples, making it compatible with common black iron and galvanized steel pipe stock available through trade supply channels.

Key Features

• FIG 3105R reducing tee pattern with 1-1/2 inch run and 3/4 inch branch outlet
• Female NPT (FNPT) threads on all three ports for standard threaded pipe connections
• 150 lb pressure rating suitable for steam, water, air, and gas service
• Malleable iron construction provides impact resistance and machinability over cast iron
• Galvanized finish resists corrosion in wet or exposed installation environments

Compatibility

Designed as an OEM-style threaded fitting replacement for 150 lb malleable iron galvanized pipe assemblies using 1-1/2 inch nominal run pipe and 3/4 inch nominal branch pipe with NPT threads.

Installation Notes

Installation is performed by licensed plumbers or pipefitters in accordance with the International Plumbing Code (IPC) and applicable local codes. Shut off and depressurize the supply line completely before removing or installing any threaded fitting. Apply an approved pipe thread sealant or PTFE tape to the male threads before assembly and tighten to a snug fit using pipe wrenches without over-torquing the malleable iron body. Do not use this fitting beyond its rated pressure class or with fluids incompatible with galvanized iron.

Technical Specifications

• Figure Number: FIG 3105R
• Fitting Type: Reducing Tee
• Nominal Size: 1-1/2 x 3/4 x 1-1/2 inches
• End Style: FNPT (Female National Pipe Thread)
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Galvanized

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811047810