Cleaning with return flow system and indication of the degree of soiling. The water can be pumped to higher placed waterfalls and back into the pool. The filter is placed next to the pool or pond and connected by a water pump (this is not included).Cleaning and maintenance The annual maintenance is limited to the control of the filter media and the UV lamp. The filter contains a modern cleaning system that can be controlled by a switch with 2 functions. You select with this switch: - Position filter - Normal function: The water is passed through the filter by means of a pump and flows back into the tank in a clean condition. Cleaning position: Maintenance mode In this position, the cleaning mechanism is ready for use, pressing the setting button drains the filter sponges without having to open the filter. In the cleaning mode, the service water can be used through an additional connection for watering the garden. Orders are processed from Monday-Friday; Not on the weekends & public holidays. We will work with you to get the case resolved in the fastest method. Please contact with us at first for more details. If product was received damaged or not as described, please send us some pictures or videos, so we could well understand your problem, then solve them for you ASAP. Besides, it's much helpful for us to claim with UPS, remind our related department to pay much more attention to packaging later on. If an item is received damaged, customer service must be contacted within 7 days of receiving your item. Payments via eCheck do not clear immediately. Usually you will wait 5-7 days after checkout for it to clear. This item is in the category "Pet Supplies\Fish & Aquariums\Filters". The seller is "wezha-84" and is located in this country: CA. This item can be shipped to Canada, United States.