Go back from June 21 water heater installation customers flu pipe had separation on adjustable elbow going up to 5 inch. Sealed off all elbows and breaking points for flu with high efficiency flu tape then ran water heater to test for any type of gas or combustion leaks. Original smell in basement dissipated and can no longer smell gas in basement used gas sniffing device and could not pick up any levels of gas after using tape also tested all joints on gas lines themselves everything is testing OK at this time. Informed customer that if company has to come back out to reroute flu itself then Company will create a separate bid to run new flu line itself. Thank you for choosing LBA and have a wonderful day.