AC UNION 3/8″

Description

The 3/8″ Brass Condensing Union (commonly known as an AC flare union, pipe connector, or straight coupling) is a high-grade forged brass plumbing fitting used to join two segments of $3/8text{-inch}$ copper refrigerant tubing together without the need for brazing or welding.It features dual $45^circ$ male flare threaded ends. When paired with standard flare nuts, it creates a high-pressure, metal-to-metal mechanical seal that can easily withstand the rigorous operating pressures of modern refrigerants. This fitting is an indispensable problem-solver for extending line sets, repairing kinked lines, or relocating indoor evaporator units.Technical SpecificationsSize Connection: $3/8text{ inch}$ SAE Male Flare on both ends (designed for $9.52text{mm}$ OD copper tubing)Material: Heavy-duty, corrosion-resistant forged brassConnection Type: Threaded Mechanical Flare (No-weld / No-braze)Pressure Rating: High-pressure optimized for modern R-410A and R-32 systems, as well as legacy R-22 setupsIncluded Components: Typically sold as a bare union block, or bundled with two matching $3/8text{“}$ female flare nutsCompatible Brands & SystemsBecause refrigeration line dimensions are strictly standardized by plumbing standards globally rather than specific appliance manufacturers, this $3/8text{“}$ flare union is 100% universally compatible with any brand or model using a $3/8text{-inch}$ line set.1. Typical System CapacitiesA $3/8text{“}$ tube diameter is the standard framework size for:The suction/gas line on smaller $9,000text{ BTU}$ ($0.75text{ Ton}$) mini-split indoor air handlers.The high-pressure liquid line on larger $24,000text{ to }60,000text{ BTU}$ ($2.0text{ to }5.0text{ Ton}$) central residential split units.2. Supported HVAC BrandsThis fitting is used daily as a repair or extension component for ductless mini-split and central split systems manufactured by:Gree / Cooper & HunterMidea / Carrier / BryantDaikin / Goodman / AmanaLG / SamsungMitsubishi Electric / FujitsuVoltas / Blue StarEssential Installation Checklist: When tightening a flare union, always use two wrenches (a backup wrench on the center hex body of the union and a torque wrench on the flare nut). Never apply thread sealant or Teflon tape to the threads themselves, as the actual seal happens strictly on the copper flare mating surface. A drop of HVAC refrigeration oil (like POE oil) on the flare face before tightening will help ensure a perfectly leak-free connection.