We at Renifoam have designed and built a stainless-steel tank that fits our high-pressure cart (item no. 0914). Using this tank, you can apply chemicals at maximum pressure (with the standard injector included, you have to lower the pressure to get the injector to draw in the chemical). The tank contains a float that mixes the chemical and water before it enters the wash cycle. This allows the jet to apply the chemical while simultaneously penetrating the ventilation ducts that were previously inaccessible. After applying the chemical, simply turn off the chemical valve, and the jet will stop dispensing the chemical.