Fox Defoamed Concentrate breaks down foam from previous cleanings.
Why would you need a defoamer? Portables need to use a defoamer to prevent foam from getting into the vacuum motors. Since the foam is lighter than water, instead of dropping into the waste tank (like the dirty water does), it just floats into the motor with the air. This causes your motors to rust up and eventually fail earlier than they would normally. The other reason is that foam builds up in your vacuum hoses and waste tanks and this restricts vacuum flow which results in loss of vacuum and wetter carpets.
Regardless, if you use a truck-mount or portable, you should carry this to protect equipment downtime and drying time.
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