Sigma 811093012 Galvanized Malleable Iron Reducer 4x2 in

Product Description

The SIGMA 811093012 is a galvanized malleable iron reducer fitting designed to connect pipe runs of different diameters in threaded piping systems. This concentric reducer transitions from a 4-inch nominal inlet to a 2-inch nominal outlet, making it a standard component in water supply, fire protection, and general industrial piping installations. The galvanized finish provides corrosion resistance for both wet and dry service environments. Licensed plumbers and pipefitters typically source this fitting for commercial and light industrial applications where a durable, code-compliant threaded connection is required.

This reducer is suited for use in residential and commercial piping systems where a reduction from 4-inch to 2-inch nominal pipe size is needed. Typical applications include water distribution mains, branch line connections, and mechanical room piping assemblies. The malleable iron construction handles the mechanical stress of threaded assembly and the pressure demands of standard plumbing and fire protection systems.

Key Features

• 4-inch to 2-inch nominal pipe size reduction in a single threaded fitting
• Malleable iron construction for strength and resistance to cracking under stress
• Galvanized finish for corrosion protection in wet service environments
• Threaded connection compatible with standard NPT pipe threads
• Suitable for water supply, fire protection, and general industrial piping

Compatibility

Designed as an OEM-style replacement or standard-supply fitting for threaded malleable iron piping systems using 4-inch to 2-inch nominal pipe sizes.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC or local plumbing code requirements. Shut off and depressurize the piping system fully before removing or installing any threaded fittings. Apply an approved thread sealant or PTFE tape to male threads before assembly, and tighten to a snug, leak-free connection using a pipe wrench — do not overtighten malleable iron fittings, as the material can crack under excessive torque. Inspect the joint for leaks after system pressure is restored.

Technical Specifications

• Inlet Size: 4 inches nominal
• Outlet Size: 2 inches nominal
• Material: Malleable Iron
• Finish: Galvanized
• Connection Type: Threaded (NPT)

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811093012