Traditional hot water distribution systems consist of a trunk and branch layout. This entails a relatively long, large-diameter main line feeding smaller branches that flow to plumbing fixtures or split to serve multiple fixtures. Even in relatively small homes of 1,200 square feet, the volume to the furthest fixture can exceed 1.5 gallons and the time to the tap can be more than 90 seconds. One efficient alternative is a central manifold distribution system using plastic piping to route all hot and cold water lines directly to each fixture or appliance from a central manifold connected to the water heater.