Sigma 810040808 Malleable Iron Pipe Tee 1x3/4x3/4 in 150 Lb

Product Description

The SIGMA 810040808 is a malleable iron pipe tee rated at 150 lb, designed for joining threaded pipe runs in low-pressure plumbing and gas distribution systems. The reducing tee connects a 1-inch run to 3/4-inch branch and outlet connections, making it a standard fitting for residential and light commercial piping configurations. The black oxide finish provides a basic level of corrosion resistance suited for dry or semi-dry interior installations. Plumbers and pipefitters install this fitting as part of threaded iron pipe assemblies where a change in line size or a branch takeoff is required.

This tee is used in residential and commercial plumbing, gas piping, and steam or air distribution systems where malleable iron threaded fittings are specified. The 150 lb pressure rating covers typical service conditions in low- to medium-pressure pipe systems. It is commonly installed in boiler rooms, mechanical rooms, and utility piping runs where NPT-threaded black iron pipe is standard practice.

Key Features

• Reducing tee configuration: 1 inch run by 3/4 inch by 3/4 inch branch and outlet
• 150 lb pressure rating for low- to medium-pressure service
• Malleable iron construction for strength and machinability at threaded joints
• Black oxide finish suitable for interior gas, air, and water piping applications
• NPT-threaded connections compatible with standard black iron pipe

Compatibility

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

Installation Notes

Installation should be performed by a licensed plumber or pipefitter following applicable IPC or IFGC code requirements. Shut off and depressurize the pipe system completely before removing or installing any threaded fittings. Apply listed pipe thread sealant or PTFE tape to male threads before assembly, and tighten to a proper thread engagement without over-torquing, which can crack malleable iron. Do not use this fitting in systems that exceed its rated pressure or temperature limits.

Technical Specifications

• Fitting Type: Reducing Tee
• Nominal Size: 1 x 3/4 x 3/4 inches
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Black Oxide
• Connection Type: NPT Threaded

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 810040808