Electric Tankless RTEX 4 (Swap out) PROFESSIONAL CLASSIC TANKLESS ELECTRIC WATER HEATERS OFFER CONTINUOUS AND ENDLESS HOT WATER WHILE ONLY HEATING WATER WHEN YOU DEMAND IT. Electrical work not include Swapped out an old electric tank unit under the kitchen sink and installed a new Rheem RTEX-4. The existing setup wasn’t up to spec, so we had to coordinate with a licensed electrician to run new wiring and upgrade the circuit to handle the load properly. Electrical work was extensive due to limited access. Once power was sorted, we mounted the new unit, made all necessary water line connections, and verified proper flow and heating. Bled the lines, checked for leaks, and tested operation—everything's running smooth now. The new tankless is fully functional and supplying hot water on demand as expected.