Fogg's direction is that all spray balls will be this new 3A approved design. In order to be 3A complaint and self-cleaning, the O-ring has been removed. Without the O-ring, the nozzles are now sufficiently self-cleaning, where in the past this was a manual procedure. The new, more intuitive design utilizes a standard hairpin to hold the nozzles in place, which is simple to use and easy to replace. The changes in this design eliminate any trapped volume, which further reduces the likelihood of contamination, as well as provide a more consistent spray pattern. Just like before, these nozzles can be located anywhere in your enclosure and specifically pressurized to best fit your custom needs.
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