This Portable Vacuum System helps protect the Main Filter in your pool from excessive dirt and debris building up and also keeps your pool looking and feeling cleaner. This system is ideal for pools, fountains, ponds, or any other water feature that might occur a large amount of debris. Basically all of the unclean and dirty water goes into the portable vacuum's filter cartridge and clean water is returned directly back into the source. This system may also be used as an auxiliary pump filtration system when the existing pump-filter is non operational. This product is perfect for winterizing and draining pools and spas.