noise when flushing toilet.

[Tobybill]

hello, when I flush my toilet, I get a humming sound when it fills. I changed the fill valve, with no luck. I noticed when I turn on the hot water with the sink next to the toilet the noise disappears. any ideas. Thank you.

 

[Sylvan]

Under the toilet hank is a isolation valve normally a globe type

A globe valve is designed for throttling so try shutting it down a little and see if that helps

 

[Sponsor]

 

[John Gayewski]

Do you have an expansion tank on your water heater? What is your static pressure?

 

[Tobybill]

Under the toilet hank is a isolation valve normally a globe type

A globe valve is designed for throttling so try shutting it down a little and see if that helps

Do you have an expansion tank on your water heater? What is your static pressure?

Do you have an expansion tank on your water heater? What is your static pressure?

no expansion tank. I don't know the static pressure.

 

[Tobybill]

Under the toilet hank is a isolation valve normally a globe type

A globe valve is designed for throttling so try shutting it down a little and see if that helps

I closed the valve a full turn, no difference.

 

[WorthFlorida]

Some shut off valves for the toilet uses a flat washer. They can vibrate as water flows and usually replacing the entire valve is needed. When you run water at the sink, the flow rate slows down to prevent the washer from vibrating. When you have the vibration, place your hand on the valve and you should feel the vibrations. Sometimes turning the valve to almost off will stop the noise.