The outlet end of such tubing shall be fastened in place. Discharge through an air gap located in the same room as the water heater. Discharge through an air gap located in the same room as the water. Not be directly connected to the drainage system. Be one nominal size larger than the size of the relief valve outlet, where the relief valve discharge piping is installed with insert fittings. 504.6 Requirements for Discharge Piping Not be directly connected to the drainage system.The relief valve, often located at the top of the. If the water heater is operating properly, the pressure in the water distribution system is no greater than is required by the code, and the relief valve is in proper operating condition, then there should not be any water discharge from the relief valve. Be constructed of those materials listed in Section 605.4 or materials tested, rated and approved for such use in accordance with ASME A112.4.1. Place it under the heater and pipe it into an adequate drain for water disposal.Not have a threaded connection at the end of such piping. Terminate not more than 6 inches (152 mm) above and not less than two times the discharge pipe diameter above the floor or flood level rim of the waste receptor.Discharge to a termination point that is readily observable by the building occupants.Discharge in a manner that does not cause personal injury or structural damage.Its a water barrier to prevent sewer gases from escaping the system. The Main issue here is keeping the sewer gases in the system and not outside. So the pipe would have a 1' min Gap to the Drain so that any back flow of water could not touch the exit pipe. Discharge to the floor, to the pan serving the water heater or storage tank, to a waste receptor or to the outdoors. Though Ariel is Correct, you would need an Air Gap.Serve a single relief device and shall not connect to piping serving any other relief device or equipment.Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap.Discharge through an air gap located in the same room as the water heater.Not be directly connected to the drainage system.The discharge piping serving a pressure relief valve, temperature relief valve or combination thereof shall:
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