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This video is about heavy foam and medium foam; the correct mixing rate; in which fire class you use heavy and medium foam and which pressures you have to pay attention to. You can support me and my channel here: Amazon wish list: https://www.amazon.de/hz/wishlist/ls/... PayPal donation link: https://www.paypal.com/donate/?cmd=_s... -- Channel info---------------- I am a machinist instructor at a professional fire department. My videos are mainly about water-carrying fittings (jet pipes, pressure relief valves, system separators, monitors, etc.), fire pumps, pressures and everything you need as a fire pump operator in a fire service operation. Due to my experience in this area, I would like to pass on my specialist knowledge through my videos. Here I express my personal opinion; however, I am generally open to constructive criticism. You are welcome to contact me at any time via email. E-Mail: [email protected] With friendly greetings Scotty --Social Media -------------------- Facebook: / scottys-masc. . Instagram: / scottys_mas. . Music source: www.frametraxx.de