Sigma 810089011 Reducing Coupling 2x1.5 in Fnpt 150 Lb

Product Description

The SIGMA 810089011 is a malleable iron reducing coupling designed for threaded pipe systems in commercial and industrial plumbing, HVAC piping, and mechanical systems. It features female NPT (FNPT) end connections on both ends and reduces from 2 inches nominal on the larger end to 1-1/2 inches nominal on the smaller end. Rated for 150 lb service, this fitting carries a black oxide finish that provides a base level of corrosion resistance in dry and low-moisture environments. It is commonly installed by licensed plumbers and pipefitters working on schedule 40 threaded pipe assemblies.

This reducing coupling is suited for residential and light commercial pipe installations where a threaded connection is required between two different pipe diameters. Typical applications include water distribution lines, hydronic heating systems, fire protection piping, and general mechanical piping where a 2-inch to 1-1/2-inch diameter transition is needed. The FNPT configuration allows direct threading onto standard NPT pipe without additional adapters.

Key Features

• Reduces from 2 inches nominal to 1-1/2 inches nominal in a single fitting
• Female NPT (FNPT) threads on both ends for standard threaded pipe connection
• 150 lb pressure rating suitable for general plumbing and mechanical piping service
• Malleable iron construction provides strength and impact resistance compared to cast iron
• Black oxide finish for base corrosion protection in low-moisture environments

Compatibility

Designed as an OEM-style replacement or standard-use fitting for 150 lb rated malleable iron threaded pipe systems using NPT connections.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter. Shut off system pressure and drain the line before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the male NPT threads before assembly. Follow applicable IPC and IFGC codes for pipe thread joint assembly and pressure testing requirements.

Technical Specifications

• Nominal Size: 2 x 1-1/2 inches
• End Style: FNPT (Female National Pipe Thread) both ends
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Black Oxide

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 810089011