Initially, I just purchased online, but ordered the wrong part. I called and talked to a real person, who helped me order the correct part and offered a reasonably priced return shipping label. That was a welcome change from other recent online purchase interactions.
1/4" male npt unloader assist valve.
Air compressor auxiliary unloader also known as a unloader assist. This valve has 1/4" male NPT pipe threads. These small valves are usually used directly in the air compressor discharge line for an additional unloading aid for starting compressors in cold weather or low-voltage situations. This valve is also available with 1/8" threads, which can be found in our other items.
Specifications:
• Thread size: 1/4" male NPT (Measure around 1/2" with ruler)
• Construction: solid brass throughout with stainless spring & viton O-ring