Plumbing Questions? Ask a Plumber and Get Answers ASAP.
Welcome to Just Answer, I will do my best to help you solve your problem
If the water level in the tank is below the overflow pipe then you may need to replace the fill valve.
WHICH IS THE FILL VALVE?
It's the part that controls the water flow/level in the tank. Refer to the picture above. If yours is an older style it ma have a float arm with a ball type float on the end
THE WATER LEVEL IS NOT BELOW THE OVERFLOW PIPE, THIS TOILET IS ONLY A COUPLE OF YEARS OLD
Then you need to adjust the fill valve so the water level is about 1/2" below the top of the overflow.
I need to know what the fill valve looks like to tell you how to adjust it
HOW WOULD I DO THAT?..THE WATER LEVEL APPEARS TO BE JUST BELOW THE OVERFLOW
what does the fill valve look like?
does it look like the one in the picture above?
YES, THE SET UP IS THE SAME
Refer to the picture. it shows a water level adjustment clip. Squeeze the ends of the clip and move it down about 1/2". If that doesn't stop the hissing then there is probably some debris fouling the fill valve and replacing it is probably your best bet
THE HISSING DID NOT STOP..THIS TOILET IS ONLY ABOUT 2 YEARS OLD , IS THIS A COMMON PROBLEM IN A TOILET THIS OLD?
The age of the toilet is not the issue. Any toilet fill valve can get fouled from debris or sediment in the water. There is one more thing you can try but if you can't get the fill valve back together you will have to replace it right away since the toilet won't work. The top of the fill valve comes off by turning it a quarter turn to the right. You can then remove it and wash out the rubber washer or any debris that has collected where the washer compresses to shut it off. Turn the water off before you do this. Then put id back and turn it 1/4 turn to the left to re-engage
THE HISSING STOPPED WHEN I SHUT THE WATER OFF..WHAT DOES THAT MEAN?
It means I've properly diagnosed the problem
GREAT..WHATS THE DIAGNOSIS ?
that water is leaking by through the fill valve like I've been saying all along
REPLACING THE FILL VALVE IS THE SOLUTION ?
or try cleaning it out like I described before
AM I TURNING THE FLOAT CUP ALSO.. IT DID NOT COME OFF WHEN I TRIED TO TURN IT AS YOU SUGGESTED
Yes the arm that the float is connected to will turn with it. If you can't get it off try turn it the other direction. If that doesn't work you will need to replace it
I CAN NOT THIS OFF..I ASSUME I NEED GET A PLUMBER TO DO THIS. THANK YOU FOR YOUR HELP.
Please hit acceptThanks for using Just Answer