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diy2007

04:51PM | 07/08/07
Member Since: 07/07/07
3 lifetime posts
Bvplumbing
I’m new to fixing toilets, but will do my best to describe the mechanism and problem ... my downstairs toilet has a float ball attached to the top of a fill valve comprised of a grooved tube that fits into a lower tube attached to the bottom of the tank. This may be standard, but the folks at my local hardware store had never heard of it. The problem is that the grooved tube pops up out of the lower tube with enough force to raise the tank lid 1-2 inches. This also causes the water to run continuously unless I: a) turn off the water supply between flushes, or b) remove the tank lid. I can push the tube back down, but it will pop up again within 3 minutes.

I purchased a fluidmaster float cup replacement and was all prepped to install it before realizing that I may have a water pressure problem. If it’s a water pressure issue, what will happen to all that pressure when the new valve is installed since it won’t pop up as easily? Should I worry about burst pipes or will it escape through other routes? I would appreciate any advice to help me identify the real problem before I plunge into fixing it. Thanks!

Billhart

08:41PM | 07/08/07
Member Since: 04/25/05
1915 lifetime posts
"my downstairs toilet has a float ball attached to the top of a fill valve comprised of a grooved tube that fits into a lower tube attached to the bottom of the tank. This may be standard, but the folks at my local hardware store had never heard of it. The problem is that the grooved tube pops up out of the lower tube with enough force to raise the tank lid 1-2 inches"

I have not seen one like that either.

But the Fuildmaster has a similar 2 part post.

It has spiral (very course thread) so that you can screw the float up or down to set the level. But there is also a ring that snaps around the bottom of the top tube.

If you pull that ring up the you can push and pull the two tubes apart.

And if you forget to push the ring down to lock it the water pressure can cause to release on it's own.

DAMHIKT.

diy2007

03:07PM | 07/09/07
Member Since: 07/07/07
3 lifetime posts
"But there is also a ring that snaps around the bottom of the top tube.

If you pull that ring up the you can push and pull the two tubes apart.

And if you forget to push the ring down to lock it the water pressure can cause to release on it's own."

Thank you for that bit of undocumented advice! I had seen where one of the diagrams states "do not move lock ring" and now understand why. I'll give that a try.

Thanks again.

diy2007

03:42PM | 07/10/07
Member Since: 07/07/07
3 lifetime posts
well ... I think I have an answer. Installing the valve was relatively painless and I followed your advice by lifting the lock ring. As soon as the tank filled with water, the upper tube popped up. So, does this indicate a definite water pressure problem or should I see what happens with the lock ring in place?

I'm hoping this will be a minor adjustment as opposed to a major repair. Appreciate your advice.

Thanks!

Billhart

07:21PM | 07/10/07
Member Since: 04/25/05
1915 lifetime posts
I DID NOT recommend lifting the ring and leaving it loose.

What I said that if you FORGET to lock the ring back down then the normal pressure can "blow it off".

If you are still concerned about the water pressure you can get a guage that fits on a hose bib (outside faucet or washer connection). They are about $10. At Lowes they are by the water heaters.
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