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Answered 2008-05-18 21:13:10

Personally I would not as the cold water could thermo shock the heater and if you have a glass lined tank it will crack it and shorten the life of the tank.=I would follow the manufacturers instructions=

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What insure that cold water is forced to the bottom of the water heater tank?

The cold water supply enters the tank at the bottom near the burner. Heat rises, as does hot water. The hot water supply is piped out from the top.

On a hot-water heater can you tie in the cold water supply at the bottom of the heater?

Personally I would not, as the cold water could thermo-shock the heater. And if you have a glass-lined tank, it will crack it and shorten the life of the tank. I would follow the manufacturer's instructions.

Why is the heater in hot water tank at the bottom?

Density of hot water is less than that of the cold water,hence the cold water from the bottom rises upwards after getting heated

How do you drain a water heater?

Turn off the cold water supply (there should be a shut off spiget by the water heater), make sure power supply is off before going to the water heater. At the bottom of your water heater is a drain cock, hook up a water hose to it, run it to the tub or outside. Turn the drain cock handle counter clockwise or to the left, on the side or top of water heater is a pressure relief valve. This needs to be opened, open it by pulling the handle located on top of it. This should drain your water heater.

How do you drain a hot water tank?

1. Turn off the electricity or gas to your water heater. 2. Turn off the cold water supply to the tank. 3. Attach a water hose the valve on the bottom of the tank. 4. Open the hot water valve on any faucet. 5. Open the valve on the water heater. 6. When the tank empties close the valve on the water heater, turn on the cold water supply, and let the tank fill about 1/4 of the way full to loosen any sediments on the bottom of the tank. 7. Turn the cold water supply off and open up the valve on the water heater to drain the rest of the water. If you have large amounts of sediment in your tank you may need to repent steps 6-7. If at any point sediment clogs the valve or the hose turn on the cold water supply to "blow' the clog out. Also remember when the tank is draining there is no water pressure so the tank will drain slowly.

What happens when hot water is on top of cold water?

Hot water is lighter then cold water so it would stay up on top of cold water till both waters naturalize to the same temp. a good example is a water heater and (if its not to old) open your drain at the bottom of the water heater and if your dip tube is still good you should always get cold water out of it even if the water heater is on and your water heater pressure is on.

Why would there be hot water in the tanks of the toilets in a recently purchased house?

Someone hooked up the hot water supply to the toilet instead of the cold water supply- or your water heater is back drawing hot water through to the toilet from a cold water inlet (supply)

Will a cold fill dishwasher heat the water?

Most dishwashers have a heater, but hot water is still better for supply.

Why do hot water tanks have a heater fitted at the bottom rather than the top?

The reason for this is because hot water rises and cold water sinks. So as the heater heats the water the hot water rises to the top of the tank while the colder water sinks to the bottom to be heated. That is why the cold water inlet is installed at the bottom of the tank while the hot water outlet is on top.

Can you use the water drain valve of a hot water heater as a source of water for a washing machine or a laundry sink?

No, cold wter enters the water heater at the bottom of the tank, right where thee valve is.

How to Keep Your Water Heater Clean?

By Andreina Urdaneta A clean water heater will heat and maintain water better and last longer. Once a year, flush your water heater, and in extreme hard water areas, at least twice a year. If you feel up to the challenge, here are some tips to help you in a basic cleaning. 1 Turn the water heater and the cold water supply to the water heater off. 2 Hook a high-quality garden hose to the drain valve, and place the other end in an area where hot water will not cause damage. 5. Open the drain valve. 6. Disconnect the cold water pipe on the top of the water heater. This step will let air into the water heater so it will drain. When the water heater is empty, close the drain. 8. Pour tile cleaner into the cold water, leave for a couple of hours and drain the detergent out of the tank. 10. Reconnect the cold water supply to the water heater. Open the cold water valve and let the water heater flush for a couple minutes. 12. Close the drain valve and open the hot water faucet nearest to the tank, and let the water heater fill. 13. When water starts to come out of that faucet, reopen the drain and let the water heater continue to rinse. After all the air is out of the water heater, turn it back on. Take care of your water heater, and it will take care of you. If you keep ignoring the task, your water heater may just leave you in the cold.

Why do they call it a hot water heater if it heats cold water. Shouldn't it be called a cold water heater?

It is just a water heater. People just say hot water heater without thinking.

Do you have to turn off the gas if you turn off the water supply to the house?

YES and No Yes if you are going to be working on the gas water heater and No if you are working on a cold water line and if you are working on a hot water line you can shut off the gas or electric to the water heater so in case your water heater drains but what I usually do is just turn the water heater's water supply valve off.

How does a water heater work?

"A water heater stores water in a tank and heats the water with a flame at the bottom. The hot water rises to the top of the tank, while the colder water falls to the bottom near the heat source." A water heater is simply a tank of water with a heat source at the bottom. It can be set to a certain temperature and is dispersed throughout the home through the water infrastructure.

Can you place a water heater horizontally on a cradle will it work?

No. Gas has to heat from the bottom and electric wouldn't be able to cycle because the cold water is supposed to be at the bottom of the tank and the hot at the top.

Why when you turn on your hot water does nothing happen but the cold water runs fine?

Check if the water supply line valve underneath the sink is on or off .."On" will be turning counterclockwise ,If not look for the hot water heater and make sure the water supply valve is turned on.

Do you use the water heater when you use just cold water?

If water is only drawn from the cold faucet, then no, the water heater is not involved. However, if water is drawn from the hot faucet- even for a few seconds- hot water IS withdrawn from the heater, and fresh cold water drawn in to be heated- even if the hot water did not make it all the way through the pipe to the faucet- and the water heater will work to heat that fresh cold water.

If you open hot water valve on the hot water heater what would happen?

The hot water valve should always be open, so the hot water can exit the heater into the system. If your actually meaning opening the drain valve on the bottom of theater, the water in the heater will drain, starting with the hot water stored there, and then the cold water that is entering the tank to replace it will simplt flow out the bottom before being heated. Dpending on where the heater is located will denepnd on how much of a mess the ensuing flood will be.

Why is cold water coming from the hot water tap?

This occurs when your hot water heater is either broken, disconnected, or has exhausted its supply of heated water. In cold weather, heated water may be cooling in the pipes on the way to the faucet, especially when it has just been turned on.

Hot water heater the we just rerouted from bathroom to attic isn't filling... no leaks and cold water works and the tank will only fill when cold water is going ... anyone know anything about that?

Check piping. Make sure cold line going into cold side of water heater and hot side coming out hot side. Cold feed for water heater should come off main cold line. Make sure valves are open to and from water heater.

Hot water heater runs out of hot water rather quickly?

if electric your bottom element is bad ...change element .. if gas or electric ..your cold flow tube is bad, change cold side flow tube.

Where is the water shut off for a bath tub?

Tubs usually do not have shut off valve for them. You have to shut off the main supply. Depending on how the house is plumbed, you may be able to shut the cold supply to the water heater and that will shut off both the hot and cold or the main line where it comes into the house.

Why does kitchen sink only have cold water?

Because hot water heater breaker has tripped, or hot water heater has failed.

Can a hot water heater siphon to cold water faucet?


Which pipe goes to hot water heater?

Cold water pipe.

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