Sigma 811090810 Pipe Reducing Coupling 3x2.5 in 150lb Galvanized

Product Description

The SIGMA 811090810 is a threaded pipe reducing coupling designed to connect a 3-inch pipe to a 2.5-inch pipe in low-pressure piping systems. Rated at 150 lb, this fitting is constructed from malleable iron with a galvanized finish that provides corrosion resistance in both indoor and outdoor installations. The reducing coupling uses standard NPT threads on both ends to create a secure, leak-resistant mechanical joint. Licensed plumbers and pipefitters install this type of fitting as part of water supply, drain, and general-purpose piping assemblies where a pipe diameter reduction is required mid-run.

This reducing coupling is suited for residential and light commercial plumbing, fire protection, and industrial piping applications where 150 lb malleable iron fittings meet system pressure and material requirements. It is commonly used in water distribution lines, compressed air systems, and general fluid-handling piping where a step-down from 3 inches to 2.5 inches nominal pipe size is needed. The galvanized coating makes it appropriate for damp or outdoor environments where bare iron fittings would be at risk of surface corrosion.

Key Features

• Reduces from 3-inch to 2.5-inch nominal pipe size in a single fitting
• 150 lb pressure class rating suitable for low-pressure fluid and gas piping
• Malleable iron construction provides strength and impact resistance
• Galvanized finish delivers corrosion protection for damp and outdoor environments
• Standard NPT threaded ends for straightforward field installation

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 150 lb malleable iron threaded piping systems using 3-inch and 2.5-inch nominal pipe sizes.

Installation Notes

Installation of threaded pipe fittings is typically performed by a licensed plumber or pipefitter in accordance with applicable IPC or IFGC code requirements. Shut off and depressurize the piping system completely before removing or installing any fitting. Apply an approved pipe thread sealant or PTFE tape to the male threads before assembly. Do not over-tighten threaded connections, as malleable iron fittings can crack if subjected to excessive torque.

Technical Specifications

• Nominal Pipe Size (Inlet): 3 inches
• Nominal Pipe Size (Outlet): 2.5 inches
• Pressure Class: 150 lb
• Material: Malleable Iron
• Finish: Galvanized
• Thread Type: NPT (Threaded)

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811090810