[ogbill]

Have a steady leak from my toilet tank which is leaving a rust stain on the cream-colored floor tiles. It's not from the water inlet fitting but appears to be from the bottom of the tank itself, a few inches in from the water entry fitting. Any ideas?

 

[rjniles]

Replace the bolts that secure the tank to the bowl.

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[Domo]

There is a gasket between the tank and the bowl. There are also gaskets around the heads/nuts of the bolts that secure the tank to the bowl. (Assuming you have a two piece toilet)

If water is dripping all the time, and the tanks refills itself sometimes and you can't see the water rippling in the bowl it's probably the washers around the bolts that hold the tank to the bowl. If it only leaks right after you flush it's probably the tank to bowl gasket.

Either way, toilets are really simple...

Rebuilding a toilet takes about $20 and 30 minutes (45 for a novice).

Replace the supply line, the float valve, tanks seal and tank bolts. Pay careful attention to how the tank bolts and their washers are installed.

Kits are available at HD or any hardware store.

Learn how to do it and save money for the rest of your life.

Oh, yeah, turn off the water supply to the toilet, flush the toilet to remove as much water from the tank as you can and then sponge out the rest. Once you've got the water out of the tank, keep a towel handing and have at it.

 

[roughneck]

It’s either the bolts leaking or the main gasket. Or something around the water fill.
Either way at least yours didn’t crack and leak in the middle of the night

 

[huesmann]

And be very careful tightening the bolts that hold the tank to the bowl, or you may get the dreaded "tink!" sound.

 

[SPS-1]

There is a gasket between the tank and the bowl. There are also gaskets around the heads/nuts of the bolts that secure the tank to the bowl. (Assuming you have a two piece toilet)

Take the tank off, and bring the old gasket with you to the hardware store. There are some variations in style. Although your old gasket has likely been compressed for 25 years, and bears little resemblance to when it was new.