One of the main differentiating factors of soft wash and pressure wash is water pressure. Pressure washing or power washing uses high-pressure water that runs at a very high PSI. Depending on the type and strength of the pressure washer, the PSI can range from 1300 to 3100 PSI. Meanwhile, soft washing uses much less power than that — more like a strong powered hose.

Another difference is what comes out of the hose. While a pressure wash relies on the high-pressure water alone to clean properly, soft washing systems use a combination of soaps, bleach, and water to ensure your exterior stays clean for the long term.