There may not be one. You may have to shut the water off where it comes into the house or at the water heater. If there is one under the sink, it should be fairly obvious. Follow the supply line from the faucet.
One for the hot water, one for the cold.
One way to get faster hot water from your faucet is to insulate the hot water pipes to prevent heat loss. You can also install a hot water recirculation system or point-of-use water heater near the faucet to reduce the wait time for hot water. Additionally, lowering the set temperature on your water heater can reduce the time it takes for hot water to reach your faucet.
One with a charcoal filter system will filter the water best for you.
No because it depends on the density... over 1 (Density of water is one) your object will sink, under 1 object will float if it is 1 it will be suspended in water (A.k.a flink)
One option is to install a recirculating pump on your hot water system. This pump continuously circulates hot water through the pipes, ensuring that hot water is quickly available at all fixtures. Another option is to insulate the hot water pipes to reduce heat loss and retain hot water temperature during transport to the kitchen.
Unfortunately, there is no one that will be able to fix your water heater for under $50. The parts alone cost a lot of money, and the average amount spent on parts and labor for fixing a water heater is $700.
My gas water heater has begun to leak. Where can I get a new one in Miami?
It would seem to me that if the smell is in one faucet it would be in all faucets. It may be that you are only using the hot water in the kitchen which could be the odor from a water heater. Water heaters can emit an odor which is caused by bacteria and the sacrificial rod in your heater.
If one cubic centimeter of the object is denser than one cubic centimeter of water, it will sink unless it displaces enough water.
look online or go to a handware store or plumbing store just make sure you get the right one for your brand water heater.
It sounds like the water heater is so far from the kitchen sink that a recirculating line may be required to keep the line feeding the sink hot, otherwise, it will cool down causing you to have to run all that cool water out before the hot gets there. The reason you get it faster when you run the bathroom is because you are drawing more GPM through the line with two fixtures on.