Midland Industries 704048-0804 Flare Half Union Adapter

Product Description

The MIDLAND INDUSTRIES 704048-0804 is a lead-free brass SAE 45-degree flare half union adapter designed to connect a 1/2-inch male flared end to a 1/4-inch male NPTF threaded port. Thread dimensions are 3/4-16 on the flare side and 1/4-18 on the NPTF side. The fitting is rated for temperatures ranging from -40 degrees F to 250 degrees F, making it suitable for refrigeration, HVAC, and fuel gas line applications. Licensed plumbers, HVAC technicians, and refrigeration mechanics install this type of fitting where dissimilar connection types must be joined in a single compact body. The lead-free brass construction meets contemporary potable-water and low-lead regulatory requirements.

This adapter is used in residential and light commercial systems where copper, brass, aluminum, or steel tubing terminates at a threaded port. Common applications include refrigerant line connections, fuel gas distribution, and compressed-air distribution where an SAE flare must transition to a tapered NPT male thread. The compact profile - measuring approximately 1.4 inches in height, 0.75 inches in length, and 0.65 inches in width - allows installation in tight spaces typical of equipment cabinets and panel enclosures.

Key Features

• SAE 45-degree flare half union design joins a 1/2-in male flared tube end to a 1/4-in male NPTF port
• Lead-free brass construction meets low-lead content requirements for plumbing and HVAC applications
• Rated -40 degrees F to 250 degrees F for use across refrigeration, heating, and fuel gas service
• Compatible with copper, brass, aluminum, and steel tubing
• Thread specifications: 3/4-16 flare side, 1/4-18 NPTF side
• Compact dimensions allow installation in confined equipment spaces

Compatibility

Designed for use with copper, brass, aluminum, and steel tubing in systems requiring an SAE 45-degree flare-to-male NPTF transition fitting.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber in accordance with applicable mechanical and plumbing codes. De-pressurize and isolate the line before disassembly or fitting installation. Flare the tubing to SAE 45-degree specification using a proper flaring tool before seating the fitting; do not over-torque the flare nut, as brass fittings can crack. Apply thread sealant compatible with the service medium to the NPTF threads only - do not apply sealant to the flare seat.