Today in Clarence, NY, I repaired a malfunctioning whole-home Reverse Osmosis (RO) water filtration system. The issue stemmed from a clogged pre-filter and a worn-out RO membrane. I replaced the sediment pre-filter and the Dow Filmtec RO membrane to restore optimal filtration performance. Post-repair, I conducted a system flush using Sterilene to ensure cleanliness and efficiency, verifying system operation through a TDS (Total Dissolved Solids) meter test.