NOS Pipe Fitting Purge Kit and Gauge Adapters

NOS Pipe Fitting Purge Kit and Gauge Adapters are precision-engineered nitrous plumbing components manufactured by Holley Performance Products under the legendary NOS brand. Designed specifically for the high-pressure demands of nitrous oxide systems, this product line delivers the leak-free connections and accurate pressure monitoring that serious racers depend on.

Why Purging Matters:

A properly purged nitrous feed line is essential to consistent, repeatable power delivery. Purging expels trapped air and gaseous nitrous oxide from the feed line before a run, ensuring that liquid nitrous reaches the solenoids instantly at maximum density when the system is activated. These same adapters serve double duty as inline gauge ports, enabling accurate bottle pressure monitoring without adding unnecessary plumbing complexity to your build.

Product Line Features:

• Precision-machined components engineered specifically for high-pressure nitrous oxide plumbing applications
• Dual-function designs serve both purge kit plumbing and bottle pressure gauge monitoring
• Available in multiple port configurations, including NPT and AN fitments across the lineup
• Swivel-type variants available for flexible line routing and simplified installation
• T-fitting, Y-fitting, and inline adapter configurations to accommodate a wide variety of plumbing layouts
• Constructed from quality materials purpose-built to handle the unique chemical and pressure properties of nitrous oxide
• Fully compatible with NOS nitrous oxide systems and NOS purge kit setups

Important Installation Note: NOS nitrous systems use 37° AN fittings. To avoid potential leaks, never mix 37° AN and 45° SAE fittings within the same system.

Racing Use Notice: These components are intended for racing use only on vehicles used exclusively for competition that are not registered for street use. It is against the law to install this part on an emissions-controlled vehicle.

Nitrous Oxide Systems has powered more racers than any other nitrous brand. Whether you are adding a purge valve to an existing system, monitoring bottle pressure, or plumbing a complete nitrous build from scratch, NOS pipe fittings and gauge adapters deliver the secure, leak-free connections your performance build demands.