Eaton 3750X4 Brass Street Tee 1/4 Inch Mnptf X Fnptf

Product Description

The EATON 3750X4 is a brass street tee fitting designed for industrial pipe assemblies requiring a compact, inline branch connection. It features a 1/4 inch male NPT thread (MNPTF) on one end and a 1/4 inch female NPT thread (FNPTF), allowing a straight run with a perpendicular branch without the need for an additional coupling. Rated to 1200 psi maximum working pressure and suitable for temperatures ranging from -65 degrees F to 250 degrees F, this fitting handles demanding fluid and gas line applications. Licensed plumbers, pipefitters, and HVAC technicians are the typical installers.

This street tee is suited for residential and light commercial plumbing, HVAC refrigerant lines, pneumatic systems, and hydraulic circuits where a tee branch must be added directly to a threaded pipe end. The MNPTF x FNPTF configuration eliminates the need for a separate nipple when connecting into an existing threaded run, making it a practical choice for tight-space installations. Its brass construction provides corrosion resistance in both wet and dry service environments.

Key Features

• 1200 psi maximum working pressure for high-demand fluid and gas systems
• Temperature range of -65 degrees F to 250 degrees F
• Brass construction resists corrosion in wet and dry service
• MNPTF x FNPTF connection eliminates the need for an extra nipple fitting
• Meets ASA, ASME, and SAE 130424 standards
• 1/4 inch thread size on both male and female ends for consistent line sizing

Compatibility

Designed as an OEM-style replacement or new-installation street tee for 1/4 inch NPT threaded pipe systems in industrial, HVAC, plumbing, and pneumatic applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC and IFGC codes. De-pressurize and isolate the pipe system completely before removing any existing fittings or installing this tee. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly. Do not over-tighten threaded connections, as brass fittings can be damaged by excessive torque.