NOS Flare to Pipe Tee Fittings

NOS Flare to Pipe Tee Fittings are precision-engineered plumbing components designed for nitrous oxide and high-performance fuel system applications. Produced by Nitrous Oxide Systems (NOS) — a flagship brand within the Holley Performance family and the most recognized name in nitrous for over four decades — these tee fittings are built to the same exacting engineering standards found throughout the entire NOS plumbing lineup.

These tee fittings bridge AN flare and NPT pipe thread connections within a single compact tee body, giving performance builders a clean, reliable method to branch or tap a fluid line without compromising system integrity. Whether routing nitrous oxide, fuel, or creating a port for a pressure gauge or inline accessory, NOS tee fittings deliver the leak-resistant performance that motorsports and high-performance street applications demand.

Key Features:

• Precision-machined construction from quality materials engineered for long-lasting durability in demanding, high-pressure environments
• Combines AN flare and NPT pipe thread connections in a single compact tee body for versatile, clean plumbing layouts
• Ideal for branching nitrous or fuel lines and adding inline accessories such as pressure gauges or solenoids
• Utilizes 37° AN flare seat geometry for leak-resistant, reusable connections
• Engineered specifically for the pressure demands and fluid compatibility requirements of nitrous oxide and performance fuel systems
• Available in multiple size combinations to accommodate a wide range of system configurations and plumbing needs
• Part of the comprehensive NOS fittings ecosystem, ensuring a complete, matched plumbing solution from a single trusted brand

Installation Note: NOS tee fittings use 37° AN flare seats — never mix 37° AN and 45° SAE fittings, as mismatched seat angles will cause leaks. Apply PTFE thread sealant paste to NPT pipe threads only; never apply sealant to AN flare seats. Select the appropriate variant to match your existing line and port sizes for a correct, leak-free installation.