12v foam generator SUCCESS 8)



  • I hope to get some foam technology advice here as to how to fine tune the foam density recipe.
    I used two 5 gallon buckets, one stacked inside the other. The whole kit fits inside the top bucket for storage and transporting.
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    I had to change the inside of the whole house filter with a 1" piece of pvc pipe cut to the length of a filter and I drilled a whole bunch of little holes at the bottom of the pipe to direct the foam up to the outlet.
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    I stuffed it full of stainless steel wool around the pipe and a wad of it up in the filter housing top, where I drilled and tapped a fitting for the air inlet. There was already a water pressure relief valve there.
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    The pump is a 12 volt sealess marine coolant pump made by Johnson.
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    I was getting consistent ~70g/L foam at about 20 psi air pressure , consistent ~50g/L at 25 psi, and consistent ~110g/L at about 15 psi. I could not get it right at 90g/L.
    This is just cheapo Kirkland brand Costco dish soap for testing purposes only. I mixed it at 2 cups per 5 Gallons H2O.
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    I consider this experiment a total success. Now my question for you experienced with foam generating, is what effect does using less soap in the water have? If my foam is too light at 25 psi, will using less soap in the water make it heavier??


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