Part 2 (Float Valve Mod):    • Instant Hot Water Line Recirculation ...  

When I replaced my hot water tank I added a naturally recirculating hot water return line. I will not demo it because its easy to understand. Wherever you have a long run away from the tank, it may take a while to get hot water to that location. Tee off the hot water pipe at the furthest place and bring the pipe back and tie into the bottom of the tank. You then need to have one way swing valve before it enters the base of the tank otherwise you can get sediment that will back flow from the tank and clog your aerators on your faucets. You will also get cooler water coming from the bottom of the tank. This video shows the modification you would need instead the standard brass valve that would be used. If you don't do this mod you will have to perform annual or sooner maintenance to the valve. If a re-circulation line is not feasible in your home you can install a point of use pump. It ties the cold and hot water pipes together under the sink and for 30 seconds will pull water from the hot and push into the cold to bring warm water to the location without running the water. I installed 2 re-circulation lines because at one end of the house it took a full 60 seconds of running water to get warm.