1" Female X 1" Male Npt Brass Air Compressor

This 1" NPT brass in-tank check valve is designed to prevent air backflow from your tank to the compressor pump, helping maintain system pressure and prolong equipment life. Commonly installed directly into the compressor tank, the female NPT end connects to the compressor's discharge line, while the male NPT threads into the tank itself. An integrated 1/8" female NPT side port allows for an unloader valve connection—typically routed from your pressure switch. If your application does not use an unloader, the port can easily be plugged.

Built from solid brass for durability and corrosion resistance, this check valve supports high airflow and provides a leak-resistant seal for reliable operation. It’s a great choice for replacing or upgrading existing compressor hardware in shop or industrial systems.

Specifications:

• Inlet Threads: 1" Female NPT (approx. 1-3/16" diameter)
• Outlet / Tank Threads: 1" Male NPT (approx. 1-1/4" diameter)
• Side Port: 1/8" Female NPT (approx. 3/8" diameter) — for unloader valve
• Total Valve Length: 3-7/8"
• Material: Solid brass construction for long-lasting performance
• Max Pressure: [Add if known, e.g., 250 PSI]
• Installation: Compatible with standard compressor systems; side port can be plugged if unused