Sigma 810030411 Straight Pipe Tee 1-1/4 in Fnpt 150 Lb

Product Description

The SIGMA 810030411 is a FIG 3105 straight pipe tee designed for threaded pipe assemblies in plumbing, mechanical, and gas distribution systems. Constructed from malleable iron with a black oxide finish, this fitting accepts standard female NPT connections on all three ports and is rated at 150 lb working pressure. At 1-1/4 inch nominal size, it is a common choice for branch takeoffs in low-pressure steam, gas, water, and air piping. Licensed plumbers and pipefitters install this fitting wherever a same-size branch connection is required on a straight run of threaded pipe.

This tee is suited for residential and light commercial piping applications including gas supply lines, compressed air distribution, hydronic heating systems, and general water service. The FNPT end style on all three outlets allows direct connection to male-threaded pipe and fittings without adapters. The black oxide finish provides a baseline level of corrosion resistance appropriate for interior dry or semi-dry environments.

Key Features

• Malleable iron construction provides strength and impact resistance for threaded piping systems
• Black oxide finish suited for interior gas, air, and water service
• FNPT connections on all three ports for standard male-threaded pipe engagement
• 150 lb pressure rating meets typical low-pressure steam and gas service requirements
• 1-1/4 inch nominal size for equal straight-through branch tee configurations

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1-1/4 inch nominal threaded pipe systems using standard NPT thread form.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing and mechanical codes. Shut off and depressurize the piping system completely before removing or installing any threaded fitting. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly and tighten to hand-tight plus the number of turns specified by the sealant manufacturer. Do not over-torque malleable iron fittings, as cracking may result.

Technical Specifications

• Figure Number: FIG 3105
• Nominal Size: 1-1/4 inches
• End Style: FNPT (Female National Pipe Thread)
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Black Oxide

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 810030411