The City of Litchfield Park requires a permit to install or replace a water heater, and its property improvement guide lists what the installation must include. Every tank-type heater gets an expansion tank. The cold water line needs a shutoff valve. The temperature and pressure relief valve must discharge outside or into an approved indirect waste receptor, and a drain pan, where one is required, needs a 1-inch drain line. In a garage, the pilot or electrical connection has to sit 18 inches above the floor.
Gas and tankless heaters add their own items. A gas heater in an enclosed space needs upper and lower combustion air, the vent needs 1 inch of clearance from combustible materials, and flexible gas pipe is limited to 36 inches. For a tankless unit, the City notes that the gas sizing or electrical supply may need an upgraded line, and it asks for the manufacturer's specification sheets at review and inspection. If the inspection is called in before 3 p.m., it is made the next business day.