Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: Ghost flush... can  I fix this w/o taking the tank off?
Document: They are American Standard toilets and all have the 1.6 gallon per flush rating and all are adjusted to fill the tank to the water line.I had not given any consideration to fill speed until I put this in and thought it was taking a ridiculous amount of time to fill the puny tank. I then did some comparison tests. I had already replaced my master bedroom tank float valve with a fluidmaster leak sentry model  so I timed the fill after flush.
I bought this thinking it would be better than the existing. Was I wrong. It takes at least three times as long to fill the tank and is very noisy. I will be taking it back.
This is the worst toilet replacement I have ever bought. It had an extra part that is to not loose water but it never worked. I was never able to raise the shaft so more water would get in the tank. I have to hold the lever until the flush is complete to have a proper flush.the only good thing is that blue roll control to select the amount of water in the bowl.
Too much water just goes down the drain literally as the design of the bowl will keep the water level the same whether you put in a gallon or a 100 gallons.I hope this makes sense. Just ask a question if it is confusing.Valve replacement is easy,  turn off water at toilet valve. Hold down flush lever to get as much water down the bowl and out of the tank, put down a towel or two under where the hose attaches to the toilet valve.
I had pipes ratting as the water refilled the tanks on two toilets. I drained all the pipes in the house thinking that it was just air in the pipes...still rattling. I called Fluidmaster and they recommended this particular model. It took less than 10 minutes to change out each tank and the pipe rattles have been fixed. Great product! !
Tried it twice with same times.I timed this model and found I was getting 54 seconds to fill the tank. This confirmed my suspicions when I first installed this lousy valve and watched how slowly the water level rose. This is exactly double the amount of time the leak sentry valve from the same company filled the tank. To some people this is not important but it is important to me.
After setup and making sure it filled to the water line in the tank, my timed readings were 27 seconds. It was the exact same as my other two toilets.I didn't take note of any noise difference between the original valve, high performance valve or leak sentry valve. They all seemed acceptable.So save your money and buy the fluid master leak sentry/leak guard valve.
Instead of buying the Fluidmaster 400A, spend the extra $1 or $2 and buy the Fluidmaster 400ARHR High Performance Toilet Fill Valve. It is much more quiet and fills very quickly. I installed the 400A and was disappointed. I replaced it with the 400ARHR and was very pleased. I used the 400ARHR to replace an older American Standard fill valve that came with my toilet/tank. It, too, was very quiet.
I really don't understand the negative hype others have posted. For me, it was a 15 minute job and believe me, I'm no plumbing wiz. My only disagreement is the instructions which want you to remove the tank from the bowl. Don't do it. You don't need to. It will install quite easily while the tank is attached.The one complaint:"WORST OF ALL, the valve wouldn't completely shutoff the water. The float had turned off the unit but it connected to slowly leak water.
This is a basic toilet filling valve and it will fill your toilet tank. I have no idea where this company gets off stating this is some kind of high performance valve. My original toilet valve, with a float, can eat this valve for lunch.The speed of filling the tank is the basis for my 1 star negative review of this valve. I did not buy this valve from Amazon, I bought it from a local hardware store a few weeks ago.
Answer: yes