Homeowners power vented water heater was leaking and homeowner wanted to upgrade to a tankless water heater. Shut water off inside the house and drained tank. Cut out CPVC water lines, transitioned CPVC to copper piping. Mounted tankless to studs and installed new ball valves for hot and cold water lines. Installed a new halo ion 6 water filter for tankless. Ion 6 will prevent lime and scale build up in the tank. Homeowner only has to flush tankless every 5 years for maintenance. Secured piping to the studs and connected water lines to the tankless. Removed section of 3 quarter black iron piping, and installed a T and ran trac pipe to unit. Installed new gas shut off and sediment trap. Ran new section of half inch of CPVC for condensate. Connected exhaust piping to 2 inch pressure exhaust vent. Ran new 2 inch PVC vent line outside, turned water on and purged air out of the system, turned gas on and set up tankless. Installed a grundfos T under master bathroom right side faucet. Recircu