Renovo Water Filter The Renovo TRIO is one of the most advanced water filters available. The Unique three stage process and Industry leading filter pore size of 0.05 microns ensures you can have safe drinking water wherever you have a fresh water source. The Trio utilizes a pre-filter, hollow fiber membrane, and an activated carbon filter. The result is a filtration rating of .05 microns that removes (99.99%) Bacteria, Protozoa, Chemicals, and even some Viruses. Meets or exceeds EPA standards. There is an apparent gap between what current filters are capable of and what is needed. With a 25 year shelf life and smaller pore size than most filters, the Trio fills the gap. The Trio is best for camping, emergency preparedness, and hiking. The Trio has many uses such as inline with a hydration reservoir, screwed on top of any standard 28 mm bottle, placed in a wide mouth water bottle, or used as a straw directly from the source. The Trio is unique in that all the filter elements can be replaced or cleaned. It is recommend that the carbon element be replaced every 12 months when out of the hermetically sealed packaging.The hollow fiber element can be simply back flushed with clean water or can be replaced. The pre-filter can be replaced as needed and comes with replacements. It is recommend to service the Trio every 1000 liters or 264 gallons.