Drained old oil boiler. Cut out and removed old boiler and accessories. Installed new PurePro Trio 4 section oil boiler with burner. Installed 2 new circulator pumps with isolation valves, zone panel, low water cut off, backflow preventer, autofeed, air eliminator, hi-vent, and expansion tank. Installed new near boiler piping for the return and supply. Installed new flue pipe and tigerloop. Started and tested the boiler for maximum efficiency.