The Vaughn range boiler stores and supplies hot water for everyday use by connecting to both a heating boiler and the domestic hot water (DHW) line. Water circulates between the tank and heat exchanger coil, either inside the boiler or mounted externally, without requiring a direct flame. Features HydraStone cement lining and bronze fittings at all six tappings to prevent corrosion and eliminate the need for dielectric unions or anode rods. Optional hand hole cleanout simplifies inspection and maintenance.