Humming Toilet? 4 Causes And Fixes For This Common Problem

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While not uncommon, humming water pipes can be difficult to live with and even more difficult to diagnose if you don't know what to look for. In most cases, vibrating pipes are caused by problems with water pressure. Water pressure that is too high or too inconsistent can cause water pipes to vibrate, which causes the humming noise that's driving you nuts. While humming can occur anywhere you have pipes, toilets are affected most often. If your pipes hum, whine, or moan only after you've flushed the toilet, you've likely found the culprit. Following are four causes and fixes for the humming noises that occur after you flush. 

Changing Pressure

As mentioned, humming pipes are most often caused by increased or inconsistent water pressure. To check your pressure, use a water pressure test gauge. Test the pressure coming from all your faucets. If the pressure is more than 60 psi, you will need to take measures to lower it. You can do so by twisting your pressure reducer valve, located in your basement or near your water meter, to a more closed position. Your goal should be 40 to 45 psi.

Checking Valves

If pressure isn't your problem, you will need to investigate further. First, you must check all of the shut-off valves on your toilet to isolate the one that's responsible for making the sound. You can do so by turning all of your valves off and turning them on individually until you hear the humming noise. After you isolate the valve, you may be able to eliminate the noise simply by adjusting the valve to a more closed position. 

Changing Valves

If adjusting the valve doesn't work, you may have a valve or washer. To fix the problem, have the offending valve replaced by a plumber. You might also want to ask the plumber to check your other valves. If one is old enough to start acting up, it's likely that another one will start giving you problems soon.

Replacing Innards

If your toilet isn't watertight, meaning if water constantly leaks from your tank into your bowl, you might start hearing noises when you flush. To make sure yours is watertight, place a few drops of food coloring into your tank. If the color travels to the bowl, you will have to have the innards of your tank replaced. 

A humming toilet isn't an emergency, but it can get aggravating. Fortunately, finding the cause is fairly simple, and most repairs to fix the problem are inexpensive. Contact a plumbing company for more info.

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