Faucet water purifier with four water flow types and a filter that doesn't need to be replaced for three years. - Filter replacement period: 3 years - Backwash function: Yes - Chlorine removal capacity: 36,000L - Water flow types: 4 (purified water, raw water straight, raw water shower, backwash) Purchased in August 2025 and used for six months. It can be used for another two and a half years. I am selling it because I can no longer use it due to moving. Thank you for looking.