The water pipes are full of cold water. All that cold water has to be flushed from the pipes before the hot water from the tank reaches your faucet.
Hot water doesn't last long in the shower because the hot water tank or heater has a limited capacity to heat and store hot water, which can run out quickly when used for an extended period of time.
The hot water runs out quickly in your shower because the water heater may be too small to meet the demand of hot water needed for a long shower. This can also happen if there are multiple people using hot water at the same time in your home.
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The volume of water that comes out of the tub faucet is much greater than the volume of water that comes out of the kitchen faucet. Let's say that the bathroom is twice as far from the water heater than the kitchen, so twice as much water has to be run to get the hot water. If the tub faucet allows more than twice as much water to pass through, then it will get there faster.
The hot water runs out after 5 minutes because the water heater tank has a limited capacity and can only hold a certain amount of hot water at a time. Once the hot water in the tank is used up, it takes time for the heater to heat up more water, causing a temporary shortage of hot water.
You could install a recirculating pump near your hot water tank and run a pipe from the furthest fixture that has hot water to this pump. This pump would then circulate the hot water back into the COLD inlet of the hot water tank and have hot water available at each fixture when you want. You would require a check valve where the recirculated water enters the cold supply to your hot water tank. CALL A PLUMBER THAT HAS FREE ESTIMATES!!!
You can not get heat from cold water, The engine has to run long enough to get the water in the engine HOT. That is were you get heat from HOT WATER-- Coolent
NOPE, actually it will cause more pressuyre drop do to friction losses
To sanitize anything, you must either clean it with chemicals or immerse it in very hot water for a long period of time. To remove physical debris, soak it in warm water and then run high pressure water through it.
In the long run a Rheem Tankless water heater will save you money in the long run by heating the water faster and you will have to run the water for a shorter amount of time for it to heat up.
The hot water runs out after 10 minutes because the water heater tank has a limited capacity to store and heat water, and once that hot water is used up, it takes time for the heater to heat up more water.
As cold as you can. Putting it immediately into ice water and keeping it there as long as you can will reduce the size of the blister that will form.