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The Thunderfog selectable gallonage nozzle has five flow settings – 95-, 125-, 150-, 200-, and 250-gpm at 100 psi. It also has a “Flush” setting. The author has used this nozzle on the “flush” setting for compressed air foam application. Using it on “flush” provides the much larger nozzle opening/aperture that is required to deliver compressed air foam. During fire operations, should an immediate need to revert to water occur, a quick twist of the gallon adjustment setting can re-adjust to deliver 125- or 150-gpm.
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