My toilet lid fell inside the tank and caused a hissing noise....

[ihatefluidmaster]

My toilet lid fell inside the tank and caused a hissing noise near the top of my fill valve. It sounds kind of like an airy sound. I dont see any water being drained, but it has been doing this constantly ever since. Kind of similar to the sound you hear when the water turn off valve under the toilet wont seal properly and wont completely stop water from coming through.

PS> I dont hate fluidmaster.

 

[DonL]

Why not just replace it ? It may be cracked.

 

[Sponsor]

 

[Jadnashua]

If the water level is rising enough to the level of the overflow tube, the fill valve is not shutting off. Could be something got bent and the float doesn't move freely, or something is broken.

 

[Jadnashua]

If the water level is rising enough to the level of the overflow tube, the fill valve is not shutting off. Could be something got bent and the float doesn't move freely, or something is broken. Shut the water off at the wall, and leave it. The valve may run, but the rod to the flush valve may be hanging up, holding the flapper up or holding it askew.

 

[Reach4]

A replacement seal may fix it. http://www.homedepot.com/p/Fluidmaster-Replacement-Seal-for-Model-400A-Fill-Valves-242/100580550

However replacing a fill valve is fairly cheap, pretty easy, and is a good DIY for those so inclined. Most people recommend replacing the hose at the same time. If you replace the hose, and if the shutoff valve is a multi-turn valve, it is best to replace that with a quarter turn valve. Those are really nice. Just replacing the fill valve is not bad IMO.

Having a toilet lid fall into the tank is unusual. I presume that somehow the lid was held vertically momentarily and slipped. However if the toilet lid can fall into the tank while the lid is horizontal, I would consider replacing the whole toilet.