Today we came to the Williams residence in beautiful area of macewan. Isolate drain and remove existing 50 gallon HWT and associated venting, gas and water piping. Install new Navian tankless unit with furthest fixture bypass. Install and test new gas and water lines, and associated vent and air intake piping for the products of combustion. Run new condensate drain line. Test unit no leaks present. Mr Williams was very happy with the service today and would rate us a 10 out of 10.