Choosing the correct fitting size is crucial when designing or upgrading your air horn or suspension system. Using the wrong size can result in poor airflow, pressure loss, or leaky connections. To get it right, you need to consider two main dimensions: the outer diameter (OD) of your air line and the thread size of the port the fitting will screw into, typically measured in National Pipe Thread (NPT).
Most air systems use standard tubing sizes like 1/4", 3/8", or 1/2" OD. The corresponding NPT fitting sizes—also often 1/4", 3/8", or 1/2"—refer to the internal thread size of the component you're attaching the fitting to, such as a compressor port or air tank. It’s important to match the correct NPT size to ensure a tight, leak-free connection. Using thread sealant or Teflon tape is also recommended to enhance the seal.
To determine the size you need, check the specs on your air tank, valves, or compressors. Measure your air line diameter and identify the port thread size. If you’re unsure, HornBlasters offers a wide selection of Versatile Brass NPT Fittings & Fitting Kits that clearly list the compatible sizes. Their fitting kits are particularly useful because they come with multiple sizes and types, giving you flexibility during installation.
The right fitting size ensures maximum airflow and minimizes the risk of leaks. Don’t guess—get the correct dimensions and invest in fittings that are precision-built for your system. HornBlasters’ product descriptions and customer support can help you select exactly what you need, saving time and preventing installation headaches.