Toilet leaks from under tank onto back of porcelain seat-area when toilet is flushed.?

Question

After flushing, water flows out of bottom of tank and down hill over the porcelain seat area, and then onto floor: irritating, messy, dangerous.
Old house, no work done there for 20+ years. Float and flapper have been replaced c. 10 years ago. What shall I try? (Plumbers are hard to lure out into country.)

Answer 1

The others who have spoken about checking and replacing the seal(s) between the tank and the seat are right. It might be a good time to also change out the "guts" (flapper, ball cock, fill unit assembly, ect..) of the toilet and to also check the mounting bolts and install a new wax ring on the base of the toilet. If you are going to do the job now you might as well get it all done at one time. All are pretty easy jobs. The hardest things are freeing the old bolts which might be frozen or rusted tight

Answer 2

The seal between the tank and the base (or bowl) is shot or the bolts holding the tank to the seat are loose or shot....or both. Two bolts go through the bottom of the tank to fasten it to the bowl. Look inside the tank and you will see the heads of them in the bottom of the tank on each side. Any hardware store sells this seal and the 2 brass or plastic replacement bolts. Shut the water off and flush and drain the tank, then remove the 2 bolts and lift off the tank. The bolts could be corroded and hard to remove, so be carefull not to crack the tank or bowl in removing. When the tank is off check the bottom for cracks first. If it's ok, then install the new seal and 2 new bolts. Get them snug and tight but not that tight that you crack or break the porcelain toilet. Then, turn the water back on,... and that's it.

.....HOPE THIS HELPS!

Answer 3

It takes a long time but the rubber seals get worn out. Cracks form and water gets out. You can take the tank off and get a new washer form a plumbing supply. It is not good to work real hard on the screws if they are rusted.....There are washers inside the tank that could leak so check them out before replacing. Every where that there is a hole on the tank there is a washer to keep the water in. Be careful with the tank you can break them if you hit the tank hard.

Answer 4

It sounds as though the gasket between the tank and the seating unit has rotted, allowing water to leak out when the flapper is raised.
I believe you can get the repair parts at any Walmart, Home Depot, Lowe's, etc. The good news is that the package usually gives directions, as I have found in my own limited experience!

Answer 5

There is a large black rubber "washer" shaped like a ring that probably erroded. You may just need to replace that piece to prevent the leak. Just look around the porcelain to make sure there are no cracks and tighten any rings but not too overly tight.

Answer 6

There are bolts and a gasket between the tank and the bowl. I would suggest, if you can, that you replace the gasket and tighten the bolts. This may not be the easiest talk, if the toilet if very old. You may have to replace it.

Answer 7

the water in a toilet tank is very cold cold water and when it runs over the water in the bowl, that water is very warm therefore is form a condensation (or sweat) and this is the water you are getting. there is nothing you can do. its the same thing as in the winter when the weather is very cold outside and the outside of the glass window is cold and inside is very warm and it heats the inside of the glass, you get a white fog on the window. same thing.

Answer 8

the bolts that attach the toilet bowl to the tank are loose, just tighten them up and your problem should be solved, I had the same problem once and come to find out my kids were leaning back against the tank when using the toilet... lol just tightened the screws and it was fine...

Answer 9

tighten all bolts and everything if problem still persists replace toilet. might be a crack in porcelain