Sigma 810041418 Malleable Iron Pipe Tee 1x1/2x3/4 in Fnpt

Product Description

The SIGMA 810041418 is a reducing malleable iron pipe tee rated at 150 lb and finished in black oxide. It features a 1-inch run with a 1/2-inch branch outlet on one end and a 3/4-inch outlet configuration, all threaded with female NPT (FNPT) connections on every port. Malleable iron construction provides good impact resistance and the ability to withstand moderate thermal cycling, making this fitting appropriate for low-pressure piping systems carrying steam, gas, air, water, or oil. Plumbers and pipefitters install this type of fitting wherever a branch takeoff is needed in a threaded black iron piping system.

This reducing tee is suited for residential and light commercial piping applications including natural gas distribution, compressed air lines, hydronic heating, and general industrial piping. The black oxide finish helps resist surface corrosion during storage and in low-moisture service environments. The 150 lb pressure rating aligns with standard Class 150 fittings used throughout the plumbing and mechanical trades in threaded piping assemblies.

Key Features

• Reducing tee configuration: 1 inch run x 1/2 inch x 3/4 inch nominal sizes
• Female NPT threads on all three ports for standard threaded pipe connections
• 150 lb pressure class rating suitable for steam, gas, air, and water service
• Malleable iron construction for impact resistance and thermal flexibility
• Black oxide finish for surface protection in typical service conditions

Compatibility

Designed as an OEM-style replacement and standard-use fitting for Class 150 malleable iron threaded piping systems using 1-inch, 1/2-inch, and 3/4-inch nominal pipe sizes with NPT threads.

Installation Notes

This fitting is installed by licensed plumbers or pipefitters working on threaded black iron piping systems. Shut off and depressurize the line before removing or installing any fitting. Apply an approved thread sealant or PTFE tape to male threads per the applicable piping code before making up connections. Follow local plumbing and mechanical codes, including IPC and IFGC requirements, for fitting selection and installation in gas or steam service.

Technical Specifications

• Nominal Size: 1 x 1/2 x 3/4 inches
• End Style: Female NPT (FNPT)
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Black Oxide

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 810041418