1 inch x 1 inch x 3/4 inch Black Iron Reducing Tee Female x Female x Female

BLK MAL TEE 1" x 1" x 3/4" – Black Malleable Iron Reducing Tee

The BLK MAL TEE 1" x 1" x 3/4" is a reducing tee fitting used in threaded steel piping systems to distribute flow or create branches in a layout. Constructed from malleable iron and finished with a protective black coating, this fitting is manufactured to ASTM A197 and ASME B16.3 specifications for use in mechanical and plumbing systems handling gas, air, oil, or water (non-potable).

Designed for use in Schedule 40 and Schedule 80 threaded steel pipe systems, the tee features three female National Pipe Thread (NPT) ends, with two equal run openings and a reduced branch outlet. This configuration supports layout flexibility in new builds and retrofit piping runs, especially where pressure and mechanical durability are critical.

Product Specifications

• Material: Malleable Iron, black finish
• Run Size: 1 inch NPT x 1 inch NPT
• Branch Size: 3/4 inch NPT
• Connection Type: Threaded (Female NPT x Female NPT x Female NPT)
• Standard Compliance: ASME B16.3, ASTM A197, ANSI B1.20.1
• Maximum Pressure Rating: 150 PSI for steam; 300 PSI for air, gas, oil, and water (non-potable)

Installation Notes

All mating threads should be clean and prepared using an appropriate pipe joint compound or PTFE tape to prevent leakage. Connections should be hand-tightened and torqued to spec using proper pipe wrenches. Ensure alignment and support of pipe runs to minimize stress on fittings during system pressurization and service.

Applications

Used extensively in commercial and industrial piping systems, this tee is suited for HVAC mechanical rooms, compressed air lines, oil distribution systems, and fire protection piping (non-potable zones). Also applicable in structural steel applications for pipe framework and bracketed systems.

Additional Technical Context

Malleable iron provides ductility and impact resistance, making it suitable for threaded applications in dynamic or vibration-prone environments. The black finish is intended for above-ground, non-corrosive service and should not be used in potable water or buried systems without additional protection.

Code-Compliant Reducing Tee for Pressure Systems

The BLK MAL TEE 1" x 1" x 3/4" delivers dimensional accuracy, pressure resistance, and mechanical reliability in branch-line installations. Engineered for integration into threaded malleable iron piping systems, it meets the performance expectations of field professionals across a range of commercial and mechanical construction projects.