Sigma 811092808 Pipe Reducing Coupling 4x2.5 in 150lb Galvanized

Product Description

The SIGMA 811092808 is a malleable iron pipe reducing coupling rated at 150 lb, designed to connect pipes of two different nominal diameters in threaded piping systems. It reduces from a 4-inch nominal pipe down to a 2.5-inch nominal pipe, allowing for diameter transitions without additional fittings. The galvanized finish provides corrosion resistance suitable for water and general-purpose piping applications. This fitting is installed by licensed plumbers and pipefitters working on commercial or industrial piping systems where threaded malleable iron fittings are specified.

This reducing coupling is used in threaded pipe assemblies where a reduction from 4-inch to 2.5-inch nominal pipe is required. Typical applications include water distribution, fire protection, and general-purpose industrial piping. The 150 lb pressure rating makes it appropriate for standard-service, non-shock, moderate-pressure piping systems in both new construction and retrofit work.

Key Features

• Reduces from 4-inch to 2.5-inch nominal pipe in a single threaded fitting
• 150 lb pressure rating for standard-service piping applications
• Malleable iron construction provides strength and impact resistance
• Galvanized finish resists corrosion in wet or humid environments
• Threaded ends conform to standard NPT pipe thread dimensions

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 150 lb class threaded malleable iron piping systems with a 4-inch by 2.5-inch nominal pipe reduction requirement.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable plumbing codes such as the IPC. Shut off and depressurize the piping system fully before removing or installing any threaded fittings. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly. Do not over-torque threaded connections, as this can crack malleable iron fittings.

Technical Specifications

• Nominal Size: 4 x 2.5 inches
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Galvanized
• Connection Type: Threaded (NPT)

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811092808