There are two basic styles of Air Quick Coupler– automotive and industrial style. We often get asked which style is better? There is no difference in performance or longevity between the styles. It is just a matter of preference. The main consideration is that the two styles are not compatible with one another. The most common frustration for people is when they have existing air couplers and they purchase the wrong style. If you already have air fittings you want to make sure you purchase the same style as your existing fittings. If you don’t know what style you have check the tip of the male plug (see pictures). The female coupler will give you no clue on what style it is. The tip on the male plug of the industrial style has a bevel or ring protruding outward. The tip of the male plug on the automotive style is beveled inward; it kind of looks like a spark plug hence the automotive name. Some manufacturers will stamp their disconnect fittings with the product number. Usually in the product number there will be an I for industrial style or A for automotive style. Some contractors who operate multiple crews will use different color air hose and different style of fitting for each crew. This way they don’t “borrow” each other’s air hose. There are some universal fittings that will work with either style, but most use a single style fitting.

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