Why is my toilet so noisy when filling?

A whining noise when the tank is filling is often caused by restricted water flow to the refill valve. Check that your main shutoff valve connected to the toilet is fully open. If this is partially closed, your tank may not be getting enough water.Click to see full answer. Thereof, how do you fix a noisy toilet fill valve?Open the toilet tank and flush the toilet. When the valve starts making the foghorn noise, lift the float ball all the way to the top of the tank. If the noise stops, there’s a loose or worn washer in the ballcock mechanism. Look for three screws in the top of the fill valve.Furthermore, why is my toilet so loud after flushing? The most common plumbing issue that comes with a toilet being loud when flushing is that water may not be flowing properly into the toilet. Water is not flowing into the refill valve at this point. This can cause backups and may cause some of the pipes or other connections in the toilet to become ruptured. Also to know, how do you stop a noisy toilet? When there is high pressure from your pressure tank or water heater, the toilet flush releases pressure, resulting in the banging sound. To fix this problem and get rid of that irritating sound, lower the water pressure in the pipes. A pressure reducing valve can often be found near your main water supply line.Why is my toilet fill valve hissing?Hissing is another common toilet noise complaint that can often be chalked up to a deteriorating flapper. Alternatively, it can also be caused by water draining into the overflow tube. You see, when the toilet tank fills to its appropriate level, the fill valve or toilet ballcock stops it from running.