Premium 20'' Surface Cleaner: The 20" pressure washer surface cleaner has the max. working pressure 4000PSI at 8.5GPM and min. working pressure 800PSI at 2GPM. NOTE: The high-pressure washer equipment connected to the surface cleaner shall not be less than 1000PSI. Higher pressure brings a cleaner washing effect. The nozzles are very small, which is particularly easy to block. As long as one is blocked, none of the three will work. 2 Jets for Fast Cleaning: Our flat surface cleaner is equipped with 2 high-speed rotating jets, which form water-intensive pressure at 25-degree to provide a faster and complete cleaning effect. There is a thick circle of stiff bristles at the bottom, keeping high-pressure water from splashing to avoid staining your clothes. Durable & Adjustable: Adopted from solid 304 stainless steel material, our surface washer features a water-proof and non-deformed design, ensuring a long service life. Its handle height and angle are adjustable, allowing it to meet needs at different heights. It provides smooth movement with its 4 universal castors. Great Connector Compatibility: You will enjoy cleaning with the labor-saving trigger gun on the pressure washer floor scrubber. This trigger gun can be easily connected to a hose with a 3/8'' connector(NOT INCLUDED). Additionally, 2 adapters of 1/4'' quick connector are provided for your optional uses. Extensive Application: Suitable for home and commercial uses, this pressure washer floor cleaner is perfect for cleaning horizontal surfaces, such as decks, patios, sidewalks, driveways, pool decks, etc. Note: If there are large rocks in the area you are cleaning, please clean them before using equipment; otherwise, the stones will damage the water outlet.