Water Filtration System Repair Near 4 Seasons Rd E. A residential client reported a leak from their water filtration system. Upon inspection, I discovered that the faucet O-ring was worn and needed replacement. The tubing connection was also loose and required tightening. After replacing the O-ring and tightening the connection, I tested the system for any leaks. The client was satisfied with my work and relieved to have a reliable water filtration system.