Tank Problems Toilet Repair Q&A

Looked under the lid of our toilet tank the other day while chasing down a slow drip, and sure enough there's a visible crack running along the inside wall. Now I'm trying to decide between attempting some kind of repair versus just swapping out the tank entirely — or maybe even replacing the whole toilet. We have two kids and this is the busiest bathroom in the house, so I don't want to be without it for long, but I also don't want to slap a band-aid on something that's going to fail on me in a few months.

I'm not totally clear on what causes these cracks in the first place — is it age, water pressure, something I did wrong? And honestly, I'm not sure if a DIY repair is even a realistic option or if it just delays the inevitable. Would love to understand what I'm actually dealing with before I drag my family to the hardware store.…more

Nobody can seem to give me a straight answer on this. My neighbor says it's a leak from the tank bolts, the guy at the hardware store told me I need some kind of anti-sweat valve, and every YouTube video I watched went in a completely different direction. All I know is that every summer morning I walk into the bathroom and the outside of my toilet tank is dripping wet — there's even a puddle forming on the floor around the base. At first I thought the toilet was leaking, but I wiped the tank dry and the water came back without even flushing it.

I've got an older home and the bathroom doesn't have great airflow. I'm not sure if that matters. Is this actually condensation, or could it be a slow leak I'm missing? And more importantly, what do I actually do about it — is this a serious problem or just annoying?…more

Three times now the toilet tank has started rocking and dripping right before we have guests over — it never fails. Every time we have people over, I'm in the bathroom with a towel mopping up a slow leak from where the tank meets the bowl, and it's embarrassing. I'm pretty sure the bolts holding the tank to the bowl have worked loose over time.

I know porcelain can crack if you overtighten things, so I'm nervous about just grabbing a wrench and going to town on these bolts. Is there a safe way to snug them down without doing more damage than I started with? Are there any signs I should look for that tell me a bolt or gasket needs replacing rather than just tightening?…more

During my morning routine I spotted a puddle forming right at the seam where the tank meets the bowl — and it definitely wasn't there yesterday. I've owned this house for about twelve years and this toilet has always been rock solid, so the sudden leak caught me off guard. The water seems to appear mostly after a flush and then sort of seeps down the back of the bowl. Is this a gasket issue, or something more serious I should be worried about?…more

My toilet tank is doing something strange — it's constantly wet and dripping on the outside, even though I can't find any cracks or loose connections. At first I thought it was a slow leak from somewhere, but when I dry it off with a towel the moisture just comes right back within an hour or so, even without anyone flushing it. The floor around the base of the toilet is starting to feel damp too, which has me worried.

The toilet came with the house when we bought it a few months back, so I don't know its full history. A neighbor mentioned it might just be 'sweating' but I'm not sure what that means or if it's actually something I need to fix. Is this a real problem and what's causing it?…more