As waste water is collected into a carpet cleaning machine, foam buildup is normal. However, controlling foam is necessary to protect the vacuum motors from water damage. Most extractors have a cutoff mechanism that stops water from overflowing into the vacuum motors. When excessive foam builds up, it can prematurely trigger the cutoff, forcing the cleaning technician to stop working and spend time emptying the extractor. Or worse, the foam can sneak past the cutoff mechanism, causing dirty water to travel through the vacuum motors and leak onto the clean floor. By using a defoaming agent, you can maximize waste-water tank space and spend more time cleaning carpets rather then tending to machine maintenance.
Adding Defoamer to The Recovery Tank
Pour 2 to 3 ounces of defoamer into the waste-water recovery tank before cleaning.
Clean the carpet as normal.
Add another 2 to 3 ounces defoamer directly to the vacuum hose. This will shower the waste tank from above, eradicating any foam.
Reapply defoamer each time the machine is emptied.