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Old 03-16-2013, 11:02 AM   #1
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Condensation on bottom of the toilet tank


Hi, In one of the bathrooms at my friends, I saw water dripping down the toilet tank.. Then I realized that the water came from the condensation... Please see the pic.

Ignore the mess around the toilet...:!

What is wrong?

Thanks
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Old 03-16-2013, 11:06 AM   #2
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Condensation on bottom of the toilet tank


Room is to humid.
Do they have a ceiling fan and use it?

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Old 03-16-2013, 11:16 AM   #3
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Condensation on bottom of the toilet tank


You could run hot water to the toilet, bit wasteful but would fix the problem. Not sure if their is a way to insulate the tank
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Old 03-16-2013, 11:53 AM   #4
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Condensation on bottom of the toilet tank


Mixing valve to temper the water. Well water I presume?
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Old 03-16-2013, 11:55 AM   #5
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Condensation on bottom of the toilet tank


Maybe a small fan by the toilet for some air circulation or dehumidifier for quick fix. They make a tempering valve which is installed on your toilet supply line. It mixes hot and cold water to prevent sweating. However, you would have to have access to hot water which most people do not have running to their toilets.

Last edited by jmon; 03-30-2013 at 12:42 PM.
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Old 03-16-2013, 12:19 PM   #6
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Condensation on bottom of the toilet tank


Jmon, so with a Bidet you mean they squirt their privates with well water????? Man, talk about a rude awakening! That would definately make tommy the turtle pull his head into his shell!
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Old 03-16-2013, 12:20 PM   #7
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Condensation on bottom of the toilet tank


Really there's nothing wrong, it's just the cold water coming in from outside causing your toilet tank to get very cold creating condensation from the humid air in your bathroom on the tank. In the summer this doesn't happen because the water coming into the house is warmer. Toilet tanks can be purchased insulated to help with this issue.
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Old 03-16-2013, 02:12 PM   #8
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Condensation on bottom of the toilet tank


Put some food dye into your tank. If any gets to the bowel without flushing your tank is leaking. You will need to replace the tank flush valve flapper.

What is happening is your water is constantly being replaced and it is cold...
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Old 03-16-2013, 02:17 PM   #9
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Condensation on bottom of the toilet tank


Is the toilet running? Typically toilet tanks sweat when the fill valve is running, or in winter if the room is kept very hot in comparison to the incoming water.
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Old 03-30-2013, 09:30 AM   #10
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Condensation on bottom of the toilet tank


The toilet is running. This bathroom is inside of the house, and is kept room tempreture.

So I think I should replace the tank flush valve flapper first to see.

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Old 03-31-2013, 11:55 AM   #11
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Condensation on bottom of the toilet tank


Quote:
Originally Posted by hohadcr View Post
The toilet is running. This bathroom is inside of the house, and is kept room tempreture.

So I think I should replace the tank flush valve flapper first to see.
You shouldn't need to replace the flush valve.

Replace the fill valve and the flapper. Feel around the edge of the flush valve when you have the flapper off to see if there are any imperfections, rough spots, etc that would cause the flapper not to seat properly. If you don't feel anything strange, the flush valve should be OK.


I've had a couple of rare occasions where the overflow tube attached to the fill valve was cracked. I was only able to detect that by filling the tank, turning off the water and watching down the overflow tube with a flashlight. Rare in my experience though.
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Old 04-03-2013, 05:13 PM   #12
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Condensation on bottom of the toilet tank


I have changed the flapper, bolts from tank to toilet, and the central gasket.

The only that wasn't changed was the fill/waterflow tube.

The condensation is still there. only around where the water inflow is, only that corner.

So, I need to change the last pieces as well..?
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Old 04-03-2013, 07:15 PM   #13
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Condensation on bottom of the toilet tank


Is the water continuing to run? Or does it fill and shut off properly? If left off and filled, does condensation form on it?

The water should not continue to run once the tank is full. If it keeps running then it will condense like that.

What's the room temperature being kept at? What's the water temp? Just how cold is it?
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Old 04-03-2013, 08:34 PM   #14
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Condensation on bottom of the toilet tank


+1

If it is still running, it will continue to dump cold water into the tank and it will continue to sweat.
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Old 04-03-2013, 09:14 PM   #15
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Condensation on bottom of the toilet tank


Doesn't seem to be running though.... The shut off works properly as well.

Room temp is about 65 degrees. water temp, unknown. We have city water, we are in a dense city area.

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