Our quick connect, disposable cartidges and membrane make it easy to complete the periodic "do-it-yourself" maintenance required for this unit. With built in auto water shut-offs, there is no need to turn off the water supply prior to performing maintenance. Change your filters in seconds with no tools required. Other traditional systems require the disinfection of the permanent housing canisters and involve more direct contact with the person changing the filters, meaning that maintenance on other systems can take as long as an hour and if not done properly, contamination of the system is more likely to occur. Filtropur's disposable cartiridges change in seconds and reduce contamination risk. Our four-stage filtration process includes a 5-micron sediment pre-filter, 10 micron coconut carbon pre- & post-filters, quick connect 75 GPD NSF Certified TFC membrane, and carbon post-filter that work in tandem to filter and polish your water before the final delivery from the spigot to your family.