Replace Filters Case 12 : AQUA Table Top Reverse Osmosis System Today prepared to replace filters for this AQUA Table Top Reverse Osmosis System. Replace Step 3 Olsmopure Membrane and Step 4 Dollton Carbon Block Filter. Changed done. Discarded the old filters. Installation Case 15 : Plan60 Rental Winix W-3TD Table Top Hot Cold Water Dispenser Replace Filters Case 11 : MIDEA Floor Standing Hot Cold RO Water Dispenser