

Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The ASC Engineered Solutions 310522800 is a black malleable iron tee fitting in an extra heavy (XH) pressure class, sized 1-1/4 x 1-1/4 x 1 inches. It joins two run outlets at 1-1/4 inches and a branch outlet at 1 inch, providing a reliable threaded branch connection in pressurized piping systems. Malleable iron construction delivers the ductility and strength required for high-demand service, and the black finish is standard for gas, compressed air, and industrial piping. Licensed plumbers, pipefitters, and mechanical contractors are the typical installers for this class of fitting.
This tee is used in residential and commercial piping systems where a threaded branch takeoff is required at a reduction from the main run. Common applications include natural gas distribution piping, compressed air lines, steam systems, and industrial fluid conveyance. The extra heavy pressure class makes it suitable for higher-pressure service conditions where standard-weight fittings are not specified. It is installed with matching NPT-threaded pipe and fittings in accordance with the applicable mechanical or plumbing code.
Designed as an OEM-style replacement or new-installation fitting for use with standard NPT-threaded malleable iron pipe and fittings in extra heavy pressure-class systems.
Installation should be performed by a licensed plumber or pipefitter in accordance with the applicable International Fuel Gas Code (IFGC), International Plumbing Code (IPC), or ASME B16.3 standards. Isolate and depressurize the system completely before disassembling or installing any threaded fittings. Apply an approved pipe thread sealant or PTFE tape to all male NPT threads before assembly. Do not over-tighten; use proper pipe wrenches and make up threads to the manufacturer-specified thread engagement without cracking the fitting body.
Thanks for subscribing!
This email has been registered!