Because the water stops flowing suddenly, it can sound like a hammer hitting the pipes. When your water pressure is too high for the system's capacity, it can leave your pipes vibrating. This vibration may result in a humming noise, especially when the water is running.
Overly high water pressure can occur in any home, but is particularly common in homes that rely on well water. How do I get rid of air in my water pipes?
Open all faucets in your home. Turn the main water supply back on once no more water is coming through any faucets. Turn the faucets off one by one once there is a steady flow of water coming from all of them.
How do I check water pressure? If your house is on city water, ask your local water department for a pressure reading. A reading of 45 to 55 psi is ideal. Or test the water pressure yourself with a pressure gauge sold at home centers. Hook up the gauge to an outside water spigot, turn on the water, and you'll get an instant reading. How do I adjust my water pressure?
Position the jaws of the wrench over the top nut of the adjustment screw. Turn the screw in a clockwise direction to increase the water pressure and a counterclockwise direction to decrease water pressure. Make the adjustment one or two full revolutions at a time.
Locate a faucet outside or in the basement that is controlled by the main shut-off valve for the house. Screw a pressure-gauge onto that faucet. Open the faucet and note the pressure. In most houses, it will register somewhere between 60 and 80 pounds per square inch. Shut off the main water supply and watch the gauge, making sure no one uses water while you conduct the test. The needle should stay where it is, but if there's a leak, it will slowly drop toward zero as the volume of water in the pipe goes down.
Call a plumber as soon as possible if the test is positive or you have another reason to suspect a leak. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since As a landscape builder, he helped establish two gardening companies.
Table of Contents. A qualified plumber can check your water pressure and ensure that it is at the correct level for proper operation.
In other cases, the problem is an easy fix — a damaged or degraded washer. Replacing a washer is a simple task, and many people are familiar with the process — but it has to be done correctly.
The first step is to shut off the water feeding the system. Unscrew the handle on the faucet, unscrew the nut within, and then take out the washer.
Put in the new washer it must be the correct size and then reverse the process. If your bathroom pipes hum when you flush the toilet, the problem may be within one of the valves. Turn off each valve while the humming sound is present, and if the sound stops, you have found the source. It may be necessary to replace the valve for the fill tank.
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