Insulated Water Pipes
OK, this one is pretty painless too. It makes sense that the longer the water stays hot on its way to your shower the less hot water you need, right? Well insulated hot water pipes can raise the effective hot water temperature at your shower head or faucet by 2°F to 4°F over the same water heater setting if the pipes were not insulated.
The beauty of this is that you don't need to insulate all the hot water piping but only the first 5 to 10 feet from the water heater. Use an insulation specially made for the specific diameter of your pipes. Securely fasten with zip ties or acrylic tape. The pipe insulation and fasteners are all readily available from the hardware store.
Pipe Insulation


