Take the toil and frustration of pool cleaning out of your routine this summer. Spend more time enjoying your pool and less time cleaning it with the Hydrotools by Swimline Sand Filter Combo.This sand filter is meticulously designed to efficiently and consistently filter your pool while optimally conserving energy and complying with new Doe compliance and regulations. The filter is constructed to promote the cleanest water quality while providing a quick and simple user experience. Carefully molded, the tank is double-reinforced to ensure a reliable, air-tight compartment for filtration action. Sand can withstand approximately 5 years of use before replacement depending on water chemistry and proper backwashing frequency.