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The SIGMA 33RT1012006006C is a black malleable iron reducing tee designed for threaded pipe assemblies in low-pressure gas, steam, and water distribution systems. The fitting features female National Pipe Taper (FNPT) threads on all three ports and is rated at 150 lb, making it suitable for standard residential and light commercial piping work. The run measures 1-1/4 inches nominal with two branch outlets at 3/4 inches nominal. Plumbers and pipefitters install this type of fitting when a branch line of smaller diameter needs to be taken off a larger main run without cutting in a weld or sweat fitting.
This reducing tee is used in threaded black iron piping systems for natural gas supply lines, steam heating distribution, and general water service applications. The black finish is standard for gas piping installations where galvanized coatings are not permitted by code. Licensed plumbers and gas fitters are the typical installers in both residential and light commercial settings.
Designed as an OEM-style threaded replacement fitting compatible with standard 150 lb malleable iron black pipe systems using NPT-threaded pipe in 1-1/4 inch and 3/4 inch nominal sizes.
Installation should be performed by a licensed plumber or gas fitter in accordance with the International Fuel Gas Code (IFGC) or International Plumbing Code (IPC) as applicable. Shut off the gas supply or water service and depressurize the line before disassembling any threaded connection. Apply an approved thread sealant or PTFE tape to male threads before assembly and tighten with a pipe wrench to achieve a leak-free joint. On gas systems, pressure-test all connections after assembly per local code requirements before restoring service.
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