Are water heater nipples dielectric?
Most water heaters come from the factory with dielectric nipples (which are galvanized) with the plastic inner sleeve.
Can a water heater be used with potable water?
Because this system will be circulating domestic drinking water at line pressure through the heating system, be sure to check with local authorities for code compliance, and only use components rated for use with potable water to limit corrosion and scaling.
What kind of water heater is required by International Plumbing Code?
Water heaters shall be installed in accordance with the manufacturer’s instructions. Oil-fired water heaters shall conform to the requirements of this code and the International Mechanical Code. Electric water heaters shall conform to the requirements of this code and provisions of NFPA 70.
What are the requirements for an electric water heater?
Electric water heaters shall conform to the requirements of this code and provisions of NFPA 70. Gas-fired water heaters shall conform to the requirements of the International Fuel Gas Code.
What are the IPC requirements for tankless water heaters?
Water heaters shall be third-party certified. 501.6 Water temperature control in piping from tankless heaters. The temperature of water from tankless water heaters shall be not greater than 140°F (60°C) where intended for domestic uses. This provision shall not supersede the requirement for protective shower valves in accordance with Section 412.3.
What are code requirements on domestic service water heating systems?
Code Requirements on Thermal Expansion Control in Domestic Service Water Heating Systems When dual-check valves and check valves are installed in water meters, they seal off the household plumbing system from the potable contaminated household water into the public supply.
What is the plumbing code for a hot water heater?
501.3 Drain valves. Drain valves for emptying shall be installed at the bottom of each tank-type water heater and hot water storage tank. The drain valve inlet shall be not less than 3 / 4 -inch (19 mm) nominal iron pipe size and the outlet shall be provided with male garden hose threads.
Electric water heaters shall conform to the requirements of this code and provisions of NFPA 70. Gas-fired water heaters shall conform to the requirements of the International Fuel Gas Code.
What should the pressure be on a hot water heater?
Storage tanks and water heaters installed for domestic hot water shall have the maximum allowable working pressure clearly and indelibly stamped in the metal or marked on a plate welded thereto or otherwise permanently attached.
