After the toilet tank is filled and the ball float is all the way up (fill level is fine and well below the bowl fill tube), I notice intermittent bubbles from the bottom of the tank fill tube that sits parallel to the flush valve. I believe that's what the item is called. It will happen for a few minutes off and on and then stop. I know there seems like a ton of air bubbles going around on that side of the tank as the water rushes in during the fill. Could that be the issue, the air coming back out? Or is it new flush valve time?

By the way this flush valve has three screws around the top of it to hold the top together and then two on the arm for the ball float. Not sure if that helps at all or not. It's an American Standard 4078 tank.

When the tank is full please check the water level in the tank it should be approx. 1" below the overflow tube see the image below, in your case it sounds like the fill valve does not stop properly you may need to adjust the water level a bit, see the next image, Thanks.

John

Thanks for your reply.

I bent the rod a bit further than I had already. The water level is definitely an inch or more below the overflow tube. It is also sitting right at the tank water level mark.

It seems to me that when the fill is complete there isn't that finally little pop up at the end. The fill definitely stops.

Nothing leaking into the tank anymore. Prior to trying to track this down, I did the food color test and noticed a bit of flash from the siphon jet hole after well more than 30 minutes. Replaced the flapper just because that's where to start with a lot of this it seems.

I have noticed some water around the top of the fill valve. Because of the three screws I see around the top of the fill valve and the sounds I am hearing (a bit of a airy wet noise before the bubbles), I am wondering if somehow air is getting into the seam that these three screws hold together.

Trying to embed a picture here.. Yes I know in this picture that the end of the bowl fill tube is not inside the circle that is meant to hold it. For some reason when it's in that circle it is a bit too far down the overflow tube.
https://lh6.googleusercontent.com/-Jm3seFnrriI/UQUB424Zt2I/AAAAAAAABOc/mYzy2Fvpehg/s912/2013-01-26%2012.21.27.jpg

Link if the picture doesn't work
https://picasaweb.google.com/lh/photo/hCVDdhxRL7kYIGcVjr_r5VL2xELdqrOJW_elwi3jDhk?feat=d irectlink


When the tank is full please check the water level in the tank it should be approx. 1" below the overflow tube see the image below, in your case it sounds like the fill valve does not stop properly you may need to adjust the water level a bit, see the next image, Thanks.

John

OOps.. see the post above.. I hit the wrong think instead of a reply.

Hello Beth,

I will suggest to replace your fill valve and recommend to buy a Fluidmaster 400A see the image below.

For some reason when it's in that circle it is a bit too far down the overflow tube.
How far down is too far down?

Hello Beth,

I will suggest to replace your fill valve and recommend to buy a Fluidmaster 400A see the image below.

I figured that's likely where I was headed. I can do this. I can I can.

How far down is too far down?

It's not below the water line of the tank. Just that when I started troubleshooting I was playing with the level of the fill tube as well and felt it did better when it was a bit higher.

If you don't presently have one, get a flexible braided toilet supply line when you purchase the new fill valve. Make things go a lot easier. Measure before you go.

If you don't presently have one, get a flexible braided toilet supply line when you purchase the new fill valve. Make things go a lot easier. Measure before you go.

I believe that's what I have on there. It's a metal flexible line that looks woven together, not the spiral kind or the vinyl.

Looking at the pdf picture 8 for the replacement valve last night I believe that means using no cone washer with what I have. http://www.fluidmaster.com/product_docs/400a_installation_instructions_english.pdf

That is correct. Your connection will look like the vinyl/braided example.

Hello Beth,

As Harold mentioned about a flexible braided toilet supply line I thought to post the link below please open and it will give you very good information about the angle stops and the supply lines, suggest to use the one you see in this You Tube, they are cheap and easy to use, if you need any help please come back we are a click away though I am on business trip in Hong Kong 7000 miles away from home but I can respond back, Good luck.

John


How to Fix a Toilet - Parts - Water Supply Valve - YouTube (http://www.youtube.com/watch?v=FR4KhLDazdk)

Luckily I think the supply line connection is good to go. (picture below)

I did the food color test again last night. Let the toilet sit overnight. Not even a hint of color in the bowl.

The occasional bubbles and bit of a wet airy noisy after the tank is filled seems to just circulate in the tank I guess. It also seems to stop completely after a few minutes.

https://lh5.googleusercontent.com/-VtzO6juzbBk/UQeESwt2YPI/AAAAAAAABOw/dffqcnJVd0E/s640/2013-01-29%252000.10.05.jpg

Congratulation Beth for the excellent job done and thanks for the update.

John

I think you fixed it when you moved that refill tube.

Sounds to me like the washer's allowing some water to seep after the fill stops pushing air bubbles ahead of it, Try this.
Forget the supply tube, Unless you see water leaking it's doing its job, b Bring the water level back up tom 1/2" under the overflow tube. Now we can start. Shut the water off to the tank and unscrew the three screws and lift the assembly up, Check the seat for nicks or rough spots. If none found then Pry out the washer and seat it back in firmly. Reassemble and test. Bubbles gone now? Good luck, Tom