There is a shutoff valve on the cold pipe going into the H/W tank, if you close it no water will come out of the tank. There should also be a shutoff valve on the wall below each faucet/tap.
get a plummer to look at the problem
No hot water may be coming out of the faucet due to a problem with the water heater, such as a malfunctioning heating element or a lack of sufficient hot water in the tank.
It is not common to hear a bubbling noise coming from you gas tank. It may be that your gas tank is too hot. You need to stop your vehicle and let a professional look at it.
Cold water may be coming out of the hot water faucet due to a malfunction in the water heater, such as a broken heating element or a faulty thermostat. This can cause the water in the tank to not be heated properly, resulting in cold water coming out of the hot water faucet.
No this is not necessary. Install the pipes as per usual. You can insulate the hot water pipes up to two meters or up to two yards from the hot water outlet from the hot water tank to prevent this. No this is not necessary. Install the pipes as per usual. You can insulate the hot water pipes up to two meters or up to two yards from the hot water outlet from the hot water tank to prevent this.
To turn off a hot water tank, locate the shut-off valve on the cold water supply line leading to the tank. Turn the valve clockwise to shut off the water flow to the tank. This will stop the heating process and allow the tank to cool down.
Install a tempering valve in water line feeding toilet. Tempering valve will mix hot and cold water together so warm water fills toilet tank which will stop condensation.
I do not have a hot water tank, so I have never had a hot water tank flush performed.
Try cleaning out or changing the aerator on the bad one.
The hot water tank might be undersized for your usage.
The hot water usually goes to a storage tank. The PRV goes there, near or at the top.
Replace it or turn your Hot Water tank temperature down