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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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The single most likely reason would be buildup of rust or calcium particles in the valves and inlet. Many showers have a one-handle arrangement wherein the handle controls mov…ement of a ball. That ball has two very small inlet holes, roughly 3mm (1/8 inch) diameter each. If your shower has this type of arrangement (and not a newer maintenance free cartridge) you can turn off the house water supply, take apart the handle and ball device, remove and replace the springs and seats for the inlets, and clean the ball with an old toothbrush and CLR. If your water heater is very old, or if you have old iron pipes for your water supply, you are likely to experience this kind of problem more frequently.
There is a pipe that connects to it that same pipe goes under ground then flows to the nearest source of water. Example: Ocean, Pond, Lake. The hot water tank works as a sypho…n to pump the water out. Of course there are filters in the lines so you wouldn't get nasty water some times you have to change your pipes to change the filter its very easy though and any plumber can do it. You know they need changed when dirt, sand, small or small fish start to flow through the pipes. You will need to change your pipes if there is a strange taste coming from the faucet.
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
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.
Is it a central water heater or a local point of use water heater? With the centralized system: . Hot water pipes are more susceptible to corrosion then cold water pipes, the… hot water accelerates the build up of rust. If you have galvanized piping, that can be a major source of slow water. . The hot water heater may also have problems which reduce the rate that water can get into the tank and from there on into the piping system. You might insure that the valves on the hot water heater and along the flow path are all fully opened. With a point of use system, it may be that there is a control valve that won't allow the water to flow unless it is a certain temperature. If it is taking longer to heat the water, it could slow down the flow considerably. When the hot side pressure is bad in all of the house it is going to be a problem with the hot water heater outlet usually. If it is just bad at one location especially when it is the shower and your shower is a single handle unit, it is the cartridge in the valve body. It is a very common problem with Moen valves as well. Simply replace cartridge by removing trim then cartridge and install new one. They should carry your part at home depot. You will be back in business. If it is all over the house try replacing the hot side nipple and supply line coming out of heater,that will usually take care of it. If not it could be build up in piping and you might need a repipe. http://aw-sons.com/slow-hot-water-flow-in-shower/
Assuming you don't have your own well but are connected to a municipal water supply this could mean that some pipes are being flushed somewhere in your area or that the …water pressure is very low.
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-sca…lding 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
Normally with no flow restrictors 18 FPS
It is no less then 110 degrees Fahrenheit.
rust colored water? This frequently happens when the water department is flushing lines upstream of you, or if there has been a large fire in neighborhood you may also have th…is to a smaller extent. Moving large amount of water breaks free rust in the pipes. It will generally go away within a few hours, you may have to run your lines a little bit.
Answer . You may need to flush out your hot water heater, there mey be alot of sediment in the tank.
= by Faucetman886 = Maybe it's the cold weather or the fact that so many people are out of work and have time on their hands to listen for it but it seems th…is weeks discussion forums are full of questions about plumbing noises, most specifically water hammer. Water hammer is that thunking, clunking, clanging noise you get when you turn a faucet off or the washing machine switches cycles. Plumbing can make many weird noises which can have many causes and; sometimes, they're not easy to isolate and fix. The following are some of the common issues. 1. Water hammer. This noise doesn't happen with flowing water, so if it occurs while your water is running, it isn't water hammer. As I mentioned at the beginning of this article water hammer happens when you turn OFF a water suddenly. Shutting off the water suddenly sends a pressure or shock wave down the water line through the water shocking the pipes and creating the hammer noise. These shock waves travel faster than the speed of sound and can exert very instant pressure. Over an extended time, water hammer can damage pipes, valves and eventually weaken pipe joints. This may in itself cause additional problems as in #6. Most newer homes have devices called hammer arresters that are air filled chambers connected to the plumbing that let the pressure wave dissipate harmlessly into a cushion of air. These arrestors can become filled with water and stopworking. If the banging in your home has been happening forever you may not have one. To correct this you must drain your house of all the water in the pipes.. Turn off your water to the house at the main shut off valve or at the meter. Find the lowest faucet in your house, often this is an outdoor hose faucet, and open it. Then open the faucets that is in the highest place in the house. Let the low faucet drain for 5 minutes or until it stops dripping, whichever takes longer. Close all the faucets and turn the main back on. When you turn the water back on the pipes will have air in them and will sputter until this air is dissipated don't panic. 2. Faulty toilet fill valve (ballcock) will cause resonance sounds like a fog horn or a moan. It's easy to check. Close the supply valves to all the toilets. If the noise disappears, open them one-by-one till the noise starts again. Replace the ballcock in that toilet. If there are no shut-offs handy, sometimes you can locate the faulty ballcock by lifting up on the float ball while someone turns on the faucet that is causing the noise. 3. Bad faucet washer. If your nosie only happens when using a certain faucet the faucet washer may be loose or damaged. This can cause it to flutter in the water stream causing various sounds To repair this tighten the screw to the washer in the faucet stem. If this doesn't work, then it's time for a new stem assembly. If your dishwasher or washing machine is causing the noise you may have a worn out solenoid fill valve. 4. High water pressure can cause a variety of problems including these noises. It can also damage toilet valves and other devices connected to the plumbing. I saw an issue on a forum last week where water pressure was cited as the cause for a hand held shower hose coming loose. If you're on a water system, ask your neighbors if they are having similar problems or simply call your water supplier and ask that they come out and check your pressure settings. If you have a well you should have a water pressure meter. If the pressure is above 60psi you may want to adjust your pressure reducer 5. Pipes rubbing or bumping inside the walls because they aren't strapped down well or because the stud pass through holes are too small or off center. If this is the case they've probably made the sounds since the house was built.. If this is the problem you will have to call a plumber to make the repair. This can be far too complicated for the average homeowner/do-it-yourselfer to handle. 6. Pressure regulator. If you have a pressure regulator on your main water line it may be faulty. If your pounding sound happens while the water's running, it happens at more than one faucet, turning on other faucets changes the cadence, the pressure changes with the pounding, While the noise is happening, check to see if it is coming from the regulator. If so, the regulator may need to be replaced. I hope this information has helped you track down your plumbing noises and given you enough info to effect a repair yourself, or better yet I hope you get a new job which takes your mind off the issue and gives you the money to pay someone to come and fix it.
Warm water comes though a facet because you have a boiler or anything else to heat up the water.
Well, you can, but it is extremely unusual. Yes 1- The hot water supply tank etc may have mineral deposits that have restricvted the flow completly 2- Someone was working on …the line and either shut the supply to the hot water sourse or closed a valve leading away from a tank or tankless coil 3- The main H/W supply pipe ruptured and in older buildings this could be under ground thus undetected for a while 4- If only one fixture is involved a washer or other obstruction is blocking the the suplly 5- A valve supplying the fixture could be blocked or shut
If you are in a house, with a well, it could be iron in the water. But more than likely you have some pipes or fittings that are old and rusting.
Unscrew the aerator at the end of the spout. Clean the screen and filter out of the aerator. Run the faucet without the aerator until all the brown water and air have cleared.… Re-install aerator. Should run normal after that.
It's probably not the faucet. It could be that there's anobstruction in the hot water side of the fixture, but it's morelikely that the hot water isn't getting to the fixture …in the firstplace. The easiest thing to check is that the hot water valve atthe wall under the sink is on.