Sigma 811045608 Galvanized Reducing Tee 1.5x1.5x1 in Fnpt 150lb

Product Description

The SIGMA 811045608 is a malleable iron galvanized reducing tee fitting rated at 150 lb, designed for threaded pipe assemblies in commercial and industrial plumbing systems. Configured in a 1-1/2 x 1-1/2 x 1 inch nominal size, it accepts female National Pipe Taper (FNPT) connections on all three ports. The reducing outlet allows a branch line to step down from 1-1/2 inch to 1 inch pipe without an additional bushing. The galvanized finish provides corrosion resistance for use in water supply, compressed air, and general fluid distribution applications. Plumbers and pipefitters install this fitting wherever a threaded run needs a reduced-diameter branch takeoff.

This reducing tee is suited for residential and light commercial piping where 150 lb malleable iron fittings are the specified class. Common applications include water distribution headers, compressed air systems, fire protection supply lines, and steam systems operating within standard 150 lb pressure ratings. The FNPT thread pattern on all three ports is compatible with standard NPT-threaded black or galvanized pipe. The FIG 3105R designation identifies this as part of a widely recognized malleable iron fitting series used across the plumbing and mechanical trades.

Key Features

• Reducing tee configuration: 1-1/2 x 1-1/2 x 1 inch nominal for inline run with reduced branch outlet
• FNPT connections on all three ports for standard NPT threaded pipe
• 150 lb pressure class rating suitable for water, air, and steam service
• Malleable iron construction provides toughness and resistance to mechanical shock
• Hot-dip galvanized finish for corrosion protection in wet or outdoor-adjacent environments
• FIG 3105R fitting series, a standard reference across plumbing and mechanical supply

Compatibility

Designed as an OEM-style threaded fitting replacement for 150 lb malleable iron piping systems using standard NPT-threaded pipe in 1-1/2 inch and 1 inch nominal sizes.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter following applicable local plumbing codes and IFGC or IPC requirements where relevant. Shut off and depressurize the system completely before disassembling any threaded connections. Apply thread sealant tape or compound rated for the service fluid to all FNPT joints before assembly. Do not over-torque malleable iron fittings, as the material is strong but not as ductile as steel pipe under extreme mechanical stress.

Technical Specifications

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

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811045608