Why does my toilet whistle when it is flushed?

Is the valve on the inlet open all the way?

Mine did that too, long before I found fluther, so copy pasted from yahoo answers:

A couple of things.
1. The toilet is probably running because the rubber stopper known as the flapper is worn out and needs to be replaced. Simple job.
Also sometimes the seat where the flapper seals the tank gets warn and may also need replaced. Little more difficult but not bad. If you end up going that far I found a different type of a flushing devise that actually works better than the standard flush valve. It’s cone shaped and the cone seals against a large rubber washer.
2. I’m guessing this is an older house. Most newer homes have limiters on the water supply to prevent the scalding problem your talking about. All that it takes to fix that is a small brass washer with a very small hole to limit the water flow into the toilet. The toilet will fill slower but you won’t burn your skin off if someone flushes. The problem is the water pressure for the cold water is dropping when the toilet starts to run. Limit the pressure to the toilet and the pressure to the other stuff won’t drop so badly.
3. The whistling is the water going through the ballcock. Sounds like it’s old too and could be replaced. Replace it and the sound will go away is my guess. Again not a hard job but messy if your not careful, have a few towels with you.

it thinks your butt is cute

Yeah Judi – that’s what I thought- but it whisles at everyone’s!

Jholler – I’ll check that.

asmonet – thanks for that – and it sounds like a ballcock problem…I should send my husband to Home Depot and let him tell them that. LOL!

I think your toilet is very happy because you keep it so clean. Since it doesn’t have any vocal cords and can’t speak to you, it would rather whistle and imagine a smile on your face. And like Judi said, it’s checking out your cute tush!

that’s why I said it was fresh! :0)

I just put a new toilet seat on it and this is the thanks I get?

Mine plays the intro to the Andy Griffith Show, but I did that on purpose.

Update! jholler – I twisted and tightened the valve on the pipe that goes into the toilet and lo and behold – no more whistling!

Thanks so much!

welcome! Making sure the connection is tight is key…I have all new floors now because mine wasn’t.

Yikes! But now that you mention it…I wonder if that is why there is a stain on the bathroom ceiling below! Oh man…it’s always something!

Here’s what I did. The ballcock (the thing the float is wrapped around) is probably the cause. You can determine this by putting your hand on it and feeling the vibration. There will also probably be water leaking out the side of the cap. If so, carefully twist the cap off counter-clockwise. It will notch over and then will lift off. First, make sure the valve tube is clear. Also make sure the little hose (that fills the toilet) is clear. Then, on the underside of the cap there is a gasket. If the gasket is worn, it will cause the toilet to whine because water is getting forced through the cap. (and probably causing it to come out the side of the ballcock cap) So, what I did, was pry that cap gasket out and then put another gasket (or you could use a washer) behind it and then put the cap gasket back in. This will make the worn gasket in the cap get a tighter seal by making it stick out more when you put the cap back on. Note: make sure you attach the metal arm lever before putting the cap back on. Whalla! No more squealing, whistling toilets!