Tiger River Tondi Replacement Filter 71827 Part Number: 71827 The 71827 compatible with pools, spas and hot-tubs using 31114 filter cartridges filters. No matter the model of your spa or hot tub, or when it was made - it's important that you regularly change your filter to prevent bacteria build-up. Choose from our selection of hot tub filters to find the right replacement hot tub filter for your spa - at the right price! Hot Spring Spa filters are a vital part of any spa system. Spa filters regulate the water that enters your spa and keep debris, dirt, and other items from floating into the pipes and damaging the pump and inner workings of your hot tub. Hot Spring Spa Supplies carries spa fragrances, air & water valves, control systems, filter accessories, lights, cleaners, pumps, thermostats, and more for virtually every hot spring model.