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The overflow tube is supposed to be higher than the normal level

And it has nothing to do with the normal operating levels in the tank.

It's like the "emergency spillway" on an earthen dam. It should never be used, and it should sit well above the normal operating range.

The overflow's sole joboverflow tube is to keepthe last defense against the tank from completely overflowing, either over the top or out the flush-lever hole. Hold down the float so the tank overfills. The water should climb to the top of the overflow pipe and go down it. If it goes out the flush lever instead, that is the only time one would ever cut down an overflow pipe, and only that much.

Again, the overflow pipe should sit well above the water surface.

If water sits at the top of the overflow pipe, that indicates a defective fill valve that won't shut off entirely. The moogie on your fill valve suggests just that has been going on for quite some time. Oh wait, you just replaced the fill valve. And now you're wondering why the new one doesn't fill this high... Yeah... Well, that's whythe new one shouldn't come this high.  

See also the legend on the back of the tank wall that says where fill level should be. That seems to agree with the instructions for the fill valve.

The overflow tube is supposed to be higher than the normal level

It's like the "emergency spillway" on an earthen dam. It should never be used, and it should sit well above the normal operating range.

The overflow's sole job is to keep the tank from completely overflowing, either over the top or out the flush-lever hole. Hold down the float so the tank overfills. The water should climb to the top of the overflow pipe and go down it. If it goes out the flush lever instead, that is the only time one would ever cut down an overflow pipe, and only that much.

Again, the overflow pipe should sit well above the water surface.

If water sits at the top of the overflow pipe, that indicates a defective fill valve that won't shut off entirely. Oh wait, you just replaced the fill valve. And now you're wondering why the new one doesn't fill this high... Yeah, that's why.  

The overflow tube is supposed to be higher than the normal level

And it has nothing to do with the normal operating levels in the tank.

It's like the "emergency spillway" on an earthen dam. It should never be used, and it should sit well above the normal operating range.

The overflow tube is the last defense against the tank completely overflowing, either over the top or out the flush-lever hole. Hold down the float so the tank overfills. The water should climb to the top of the overflow pipe and go down it. If it goes out the flush lever instead, that is the only time one would ever cut down an overflow pipe, and only that much.

Again, the overflow pipe should sit well above the water surface.

If water sits at the top of the overflow pipe, that indicates a defective fill valve that won't shut off entirely. The moogie on your fill valve suggests just that has been going on for quite some time. Oh wait, you just replaced the fill valve... Well, the new one shouldn't come this high.

See also the legend on the back of the tank wall that says where fill level should be. That seems to agree with the instructions for the fill valve.

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source | link

The overflow tube is supposed to be higher than the normal level

It's like the "emergency spillway" on an earthen dam. It should never be used, and it should sit well above the normal operating range.

The overflow's sole job is to keep the tank from completely overflowing, either over the top or out the flush-lever hole. Hold down the float so the tank overfills. The water should climb to the top of the overflow pipe and go down it. If it goes out the flush lever instead, that is the only time one would ever cut down an overflow pipe, and only that much.

Again, the overflow pipe should sit well above the water surface.

If water sits at the top of the overflow pipe, that indicates a defective fill valve that won't shut off entirely. Oh wait, you just replaced the fill valve. And now you're wondering why the new one doesn't fill this high... Yeah, that's why.