Female Pipe Flare Tee 4an to 1/8npt

The Female Pipe Flare Tee 4AN to 1/8 NPT by AEROQUIP is a critical adapter fitting designed for custom fuel, oil, and coolant line systems in high-performance and modified vehicles. This tee fitting serves as a junction point where a primary 4AN hose branches into a secondary 1/8 NPT port, making it essential for fuel pressure gauge installations, proportioning valve setups, and dual-circuit cooling upgrades. Whether you're building a fuel-injected engine conversion, upgrading brake cooling systems, or installing auxiliary gauges, this compact fitting provides the reliable connection point your modified fuel and fluid delivery systems demand.

AEROQUIP's FCM2818 uses a flared connection design on the 4AN side, which seats securely against a matching flare nut to create a leak-free seal under pressure—critical when handling fuel systems where safety and reliability are non-negotiable. The 1/8 NPT female port accepts standard NPT-threaded adapters and sensor fittings, offering flexibility for gauge installation or secondary line connections. The compact 2.35-inch body width and minimal 0.12-pound weight make this fitting ideal for engine bay installations where space and weight savings matter. Aerospace-grade construction ensures durability in high-vibration environments and compatibility with synthetic fluids and modern fuel additives.

This fitting is favored by engine builders, fuel system tuners, and street-performance enthusiasts who need reliable branch points in custom fuel systems, oil pressure monitoring circuits, and coolant distribution networks. The 4AN to 1/8 NPT configuration accommodates both hose-based primary lines and sensor-threaded secondary connections, eliminating the need for multiple adapters. Installation requires standard flare-nut wrenches on the 4AN port and a wrench or socket for the NPT port—straightforward for any technician familiar with hose fitting work. Verify your primary line uses 4AN compression fittings and confirm NPT thread compatibility with your gauge or secondary component before ordering.