Challenge: Toilet Leaks Through Bolts But Only When Flushed! - Plumbing - DIY Home Improvement | DIYChatroom


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Old 08-25-2006, 07:58 AM   #16
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Challenge: Toilet Leaks through bolts but only when flushed!


Quote:
Originally Posted by racerted
I used blue pellets to color the water.
Where was the color water trial that should have shown up from using this color tablet?

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Old 08-25-2006, 10:40 AM   #17
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Challenge: Toilet Leaks through bolts but only when flushed!


This is standard commerical grade toilet with no pressure assist. In fact it is the Fluidimaster setup that Ron shows in the picture.

I have tried 3 different flange gaskets by two different manufacturers. I have installed them all flush against the tank. They were black or red and thick, about 3/4" to 1" in height.

I've been busy with kids soccer so I haven't had chance to play with it but will this weekend. Stay tuned.
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Old 08-25-2006, 04:09 PM   #18
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Challenge: Toilet Leaks through bolts but only when flushed!


Non-existent. That really confused me. It just dripped down the bolts. I couldn't really see anything else. That's what really bothered me. I should have seen a trail from the flange gasket to the bolt but I didn't.
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Old 08-25-2006, 06:54 PM   #19
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Challenge: Toilet Leaks through bolts but only when flushed!


I almost believe there is a hairline crack in the bowl, not the tank but bowl near the bolt area, which leak would not be seen until you flush the tank, other then that without seeing it for myself, thats all I the idea's I can give.

When you do solve it please post your findings.
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Old 08-28-2006, 11:27 AM   #20
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Challenge: Toilet Leaks through bolts but only when flushed!


Another few hours of frustration yesterday. I replaced the valves, flange gasket, flange nut. Still leaks. What I did realize is that there is lots of adjustability with centering the tank. The bolts are 1/4" in ~1/2 inch holes. Moving things around didn't seem to work.

Also I tried your bolts installation order. I didn't like the rubber washers on the outside of the tank because the tank didn't seem to sit close enough. I still believe the leak is from the flange gasket as I did see some wet spots on the gasket this time.

I haven't tried removing the rubber grommets on the back of the bowl. I assume they function as shims and bumpers.

I can't see any cracks nor do I see how these could cause leaks. I'm losing credibility with my wife for fix it jobs too.
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Old 08-28-2006, 01:29 PM   #21
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Challenge: Toilet Leaks through bolts but only when flushed!


If your other toilet is the same make then swap out the tanks and see if the problem follows the tank.
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Old 08-28-2006, 02:47 PM   #22
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Challenge: Toilet Leaks through bolts but only when flushed!


They are all the same. I'm a little gun shy right now. I'm worried that I might be stuck with two leaky toilets and my wife would really be ticked at me.

I'm beginning to question my manliness if I can't fix a damn toilet.

Again I come back to being an engineer for this leak. I want to understand the physics of the leak. I'm talking forces, pressure, head, etc. When the toilet is just sitting there, the rubber washers under the bolt head in the tank and the flapper prevent any leaks. Then I flush and the water is supposed to exit the tank via the valve flapper. At this point the water is held in the valve and bowl with the flange gasket. I would think the tank weight along with the tightened wing nuts compress this flange gasket into the female portion of the bowl. With proper centering and compression, there should be no way the water can get to the bolts in the space between the tank and the bowl.

The only piece of info I haven't provided is that I used the standard replacement brass washer and nut on the outside of the tank. I think the original that I removed and discarded was a plastic one. I guess its possible this is creating an interference and I can't get the compression on the gasket that is necessary. This could just be that it doesn't fit. However, this a standard "Gerber" elongated two piece toilet. When I compare this toilet to the one in which I already replaced the valves etc, I see the same clearance between the bowl and tank.
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Old 08-28-2006, 05:37 PM   #23
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Challenge: Toilet Leaks through bolts but only when flushed!


My advice would be to try and get over your gunshyness and swap out those tanks. Redline's right. It may be a problem that you simply cannot see and swapping out the tanks will narrow the possiblity of troublespots. C'mon, being an engineer, you"ve GOT to respect the process of elimination...
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Old 08-28-2006, 07:12 PM   #24
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Challenge: Toilet Leaks through bolts but only when flushed!


Did you install a new flush valve?
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Old 08-28-2006, 10:19 PM   #25
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Challenge: Toilet Leaks through bolts but only when flushed!


I'm not gun shy. As far as I see it, I'll still have one working toilet. But then the wife will be all over me.

Yes, I tried another valve assembly and got the same results.
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Old 08-28-2006, 10:35 PM   #26
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Challenge: Toilet Leaks through bolts but only when flushed!


My two cents - I'm not a pro but have replaced a few of these in my time.

The leak has to caused by fit of the tank onto bowl.

- Make darn sure the the "gasket" is fitted properly over the large nut.
- Make sure there is nothing "rough" where the gasket fits onto the bowl.
- Remove those bumpers - I've never seen them.
- If your supply line is a "solid" copper tube vrs the flexible supply line - make sure that it is not pulling the tank down or pushing the tank up before starting to tighten the nuts-
- Use brass nut instead of the wing nuts - don't overtighten, but make sure that you tighten them equally - kind of wiggle it into place then alternate. It should be reasonably level when complete. and not tilted front to back.
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Old 08-29-2006, 09:03 AM   #27
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Challenge: Toilet Leaks through bolts but only when flushed!


Did you take the tank outside and run any test on it, like fill tank flush it, fill tank flush it .

Hairline crack on tank where the problem bolt is, replace the tank or get a new toilet.
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Old 08-30-2006, 05:39 PM   #28
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Challenge: Toilet Leaks through bolts but only when flushed!


Update?
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Old 11-03-2006, 09:38 PM   #29
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Challenge: Toilet Leaks through bolts but only when flushed!


Stop the presses.

He said the magic "G" word, "Gerber".

Gerber doesn't use a standard spud gasket that you will find in the kit, its uses a special thick gasket. In fact, its the thickest one made, as far as I know (at least for domestic toilets).

Most spud gaskets are 3/4" to 1" thick. The Gerber is 1-3/16" - 1-1/4". Go down to your local hardware store and ask them for a Gerber spud (tank-to-bowl) gasket.

As for the physics, I can't say for sure, but I think that during a flush water is returning up the gasket between the flush valve and gasket and hitting the bottom of the tank and washing to the sides, wetting your tank bolts. Your gasket is not compressing enough. Gerber has a large recess for this to fit into and its quite difficult to see the spud gasket with the tank installed, let alone see if its leaking.
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Old 11-04-2006, 10:59 AM   #30
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Challenge: Toilet Leaks through bolts but only when flushed!


I would take that toliet outside and smash it in the drive way. Why? Because its peeing me off.

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