1.Put the water pipe on the inlet and outlet of the filter pump. 2.After setting,tighten the screws to fix the water pipe and filter pump. 3.The other end of the water pipe should be set on the water outlet of the swimming pool.the same as the above operation. 4.The filter needs to be inserted into the water outlet from the inside of the swimming pool to prevent leaf hair from entering the filter pump. Keeping your pool filter working on cleanest state. Enjoy your time in a clean and fresh swimming pool ！ Replacement Pool Filter Cartridge Product Specification Height: 7.87 inch Diameter: 5.3 inch Opening Diameter: 1.96 inch Package Includes: 1 Pack Pool Filter+Pump How to order a replacement cartridge? 1. Look at the old filter cartridge's part number, and confirm whether the filter is compatible 2. If you don't know the part number, please check the size in the picture, choose the right cartridge to measure the dimension Pool Spa Filter Replacement Cartridge Product Features 1. High Quality - A/C Type Replacement Filter Cartridges for inflatable spa, pools, effectively removes dirt from the water and is easy to clean and wash out 2. Inflatable hot tub filter is installed inside the filter pump to ensure its higher efficiency 3. Filter the water to keep it attractive and fresh throughout the cool summer