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Answered 2010-08-02 15:54:05

Your cold water comes directly from the main line without hitting resistance. Your hot water travels through your water heater which may decrease the pressure. Is this a new problem or has it always been like this? If it is a new problem you may be getting build-up in the lines near the water heater or even in the water heater.

Hot water also tends to have more deposits in the piping. If you have galvanized piping, you could have a lot of corrosion in the pipes. Hot water heaters do get scaling build up. It might be worth having it checked out, a broken hot water heater can be pretty messy!

The answer may differ according to where you live. In the UK the cold water comes from the main which is kept at a moderately high pressure, for example by a water tower. Any leaks are then "outwards" with less chance of inward contamination. The hot water in a house is generally provided from a tank in the house attic, which auto-refills when water is drawn off, stoppnig when full by a floating arm which cuts off the supply to it. This tank at relatively low height provides lower pressure water to the house boiler.


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Because hot water and cold water have different circuits.

The supply of water needed by toilet as it refills is greater than what shower supply is, not actually a lack of pressure so much as a lack of water volume. Pipe sizing needs to be properly sized so this "pressure drop" won't occur. Installing a new shower pressure balancing valve should help with this problem if running new cold water lines of proper size isn't possible or practical.

If you mean to ask if cold bodies of water are associated with high or low atmospheric pressure, they aren't. Atmospheric pressure can change independently of the temperature of bodies of water.

The piping has to be the exact same length for each shower head from the tee where the cold and hot water feeds from the top of the diverter faucet.

It is very cold water. At normal pressure, it is as cold as water can get before it starts to freeze.

More than likely it is restiction in your water heater.

Water pressure increases as the water gets warmer. If water is cold, it doesn't provide much pressure because the molecules move slowly.

Low water pressure or cold water main undersized.

I am not a plumber, but am in the process of installing a water line myself...and all of the research I have done says the water line should be hooked up to the cold water.

It depends on the pressure. At normal atmospheric pressure, the melting point of water is about 273.15 K.

1. When the flask was placed into the cold water, the colder air molecules in the flask move slower, putting out less pressure. With the decrease in air pressure inside the flask, the now greater pressure outside pushes water into the flask until the pressure inside equals the pressure outside.

You have to fill the can with steam and then seal it closed. when you then put the can in cold water the steam will condense into water and the can will be crushed by atmospheric pressure.

Standard instillation of a washer identifies the valve s as hot on the left, cold water on the right. In any water instillation, the standards are hot on the left and cold on the right.

perhaps the water heater is clogged with lime deposits.. ? but I have no clue

My guess is that the hot water heater is installed downstream from a pressure reducer to limit the maximum water pressure that the water heater is exposed to.

poor water pressure from your city. Or if you are on a well, the pump might be going bad.

Depends where you are testing it. Possibly just a plugged aerator, or a broken seal.

presure regulator is on the incoming cold water line

Which water tank, well water, cold storage or hot water heater tank.

It may be in the main cold water shutoff or if you have a water pressure reducer it may be in the reducer manifold

Yes. When water is heated, the H2O molecules tend to disperse because they vibrate more and this causes more pressure.

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