Compressed Air 1/4" Male NPT Air Compressor Auxiliary Unloader Assist Valve

1/4" Male NPT Air Compressor Auxiliary Unloader Valve / Cold Start Assist

Compressor having trouble starting or burning up motors? Boost your air compressor’s start-up performance with this auxiliary unloader assist valve, specially designed to relieve pressure in the discharge line during startup. Ideal for cold weather conditions or low voltage applications, this compact valve helps ease the initial load on your compressor motor, making it easier to start and improving long-term performance.

Featuring a 1/4" male NPT thread, this valve is typically installed directly in the compressor discharge line. Between the compressor pump and check valve. It serves as a valuable add-on to systems that experience hard starts or frequent tripping. Constructed from durable solid brass, it includes a stainless steel internal spring and a Viton O-ring for reliable, leak-free operation over time.

A simple yet effective upgrade for air compressor systems that need a little extra help getting going—especially in tough conditions. Proudly engineered for performance and durability.

Made In USA

Specifications:

• Thread Size: 1/4" Male NPT (1/4" NPT measures approx. 1/2" in diameter)

• Application: Assists compressor startup during cold weather or low voltage

• Installation: Inline with discharge piping from compressor pump

• Material: Solid Brass Body

• Internal Components: Stainless Steel Spring & Viton O-Ring

• Function: Provides auxiliary unloading support for smoother motor starts

• Availability: Also offered in 1/8" NPT (see our other listings)