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Why does hot water coming from a faucet have a different pitch noise than cold water coming from a faucet at the same pressure?
Water Pressure Here is what Contributors had to report on water pressure sounds:
- First, the temperature of the water affects the internal diameter of the faucet and faucet neck where the water is delivered. Hot water coming through the faucet neck will cause inward expansion, parially closing off the neck and altering the acoustic characteristics of the faucet neck. Cold water will have the opposite effect. Second, hot water follows a different path from cold water. The hot water pipe will have a different length in most cases because it is coming from a different place; this, combined with the resonant frequency of the water heater itself, will alter the resonant frequency of the plumbing compared to the (mostly) straight-through cold water pipes.
- Actually pipes expand outward when hot. That is, they will have a larger diameter, both internally and externally. They also become longer.
- The actual answer lies with cavitation of the water... which is where the sound is coming from in the first place.
- As the water crosses the partially opened valve of the faucet, it undergoes a rapid decrease in pressure. This decrease in pressure leads to the creation and collapse of tiny bubbles of water vapor and dissolved air in the water. This effect is called cavitation and is quite noisy as the small bubbles collapse and generate shock waves. -At colder temperatures, fewer and smaller bubbles with a shorter lifespan are created.
- At higher temperature, more, longer lasting, and larger bubbles (and the sound they make) are created. This changes both the pitch and intensity of the sound as the water temperature changes. It's also why you can change the sound by opening and closing the valve slightly, which changes the drop in pressure.
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\n. \n HOT WATER PROBLEMS \n. \n. \nYOUR HOT WATER TANK NEEDS TO BE REPLACED\n. \n. \n Answer \n. \nIt could be cross connected, I would turn on any faucet, then… go listen at your\nwashing machine and see if you hear water running through the hot and cold valve\nwhere your hoses hook on. If you do you need to replace valve on machine. If it is\na new house they may have tied the hot and cold water together. That is very very\nhard to find. You would have to call a plumber for that and then hope for the best.\nStill try the washer even on new house.
Could be a partial blockage in the supply lines to the faucet. Could also be a different size of supply line. The faucet valves may also need cleaning.
Answer . You may need to flush out your hot water heater, there mey be alot of sediment in the tank.
I have just the opposite problem.. I'm only getting very hot water coming out of shower head.. What I've been reading is it's most likely the mixing valve/anti-scalding valve….. As long as you are getting normal water temps and pressures from your sinks then you should either replace or repair the showers mixing valve.. The best I can explain the way the mixing valve works is it uses the pressure of both the cold and hot water to limit the amount of either hot or cold water that it will let pass through it. If the valves don't slide properly do to dirt or any thing that may build up on the valve or valve seats then the mixer valve can't do it's job properly.. Hope this helps. Ken
The faucet opening screw thread is stripped, the faucet washer has collapsed, the pipe is furred up, the boiler has a problem
The water you get from your faucet can come from two places - from the water in lakes or rivers (surface water), or from water that comes from wells (groundwater). Many people… in this area who live in large cities or towns get their water for drinking from lakes and rivers. But, most people in the United States get their drinking water from groundwater. . from: http://www.epa.gov/region7/kids/drnk_b.htm
Because someone switched the lines or labeling. < 1- Someone installed the piping not bothering to read modern codes requiring water hot and cold to be 6" apart 2- C/W …supply to a tank or other heat source does not have the 27" heat trap (loop) to prevent stratification of hot water molecules entering the potable water supply 3- Failure on the part of an installer of appliances that use both hot and cold water supply to have an air gap or vacuum breaker or the very least a check valve 4- Cold water lines picking up ambient heat from the surrounding air or close contact to heating lines 5- Cross connections see #3
\nBecause hot water is still in the pipes from when you turned on the hot water, and when you turned on the cold faucet it had to let out the hot water first.\n. \nThis means… you have a single-pipe sink. Double-pipe sinks have a pipe for hot and a pipe for cold and it blends them as it turns on.
With a pressure booster pump
I just brought a Glacier Bay pull down ceramic kitchen faucet Model 896408. After installing it, the cold water wasn't coming out of the faucet. It turned out the problem was …the coldwater supply line inside the faucet was bent & twisted. As a result, when the body of the faucet was attached, it had to be turned just a little to position it correctly, this tighted and choked the water supply line even more- which meant "no cold water." Waiting on replacement line from Glacier Bay, which, I am certain, will correct the problem.
Through magic hot water elves. That's how hot water does come home.
Unless there is a recirculating pump the hot water has to come from the hot water heater. Depending on how far away it is from the faucet, it can take 15 to 30 seconds for the… hot water to get there. Since there is nothing in the pipe to keep the water hot, it cools down between uses.
Sounds like your water heater is not working. Feel around the hot water heater and the lines and pipes and see if it feels warm. Also, if it's an electric HWH, find the circui…t breaker for it and see if it has tripped. If it has, turn the breaker OFF, then back on and see if that helps. If not, contact a qualified plumber to have a look at it.
There should be two valves on or near the top of your water heater. One is for the inlet (cold water) into the heater the other is for the outlet (hot water) out of the heater… to your house. They must both be open ( turned to the left or counter clockwise).
If shut off the hot water valve then you take off your supply line from your hot water valve to your faucet and then turn your hot water valve on slowly (with of course a buck…et or something to collect the water under it) and if you can see you have water pressure and flow then most likely the problem would be in your faucet on the hot side. If you have no pressure or flow when you turn the hot valve on then it could be debris plugging your hot water pipe or your hot water service valve (angle stop, straight stop) which older galvanized pipes are known to do so. To fix the problem you would need to find out where the problem is then either fix or replace the faucet or replace the angle/straight stop or try back flushing the hot water pipe and or replace the pipe with pex or copper pipe.
Mine comes from the local water processing and filtration plant, but this varies depending where you are, as yours may be coming straight from a river, dam, etc.; something th…at you don't want it to be coming from.