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Plumbing Problems
There is water on the floor around your toilet. Before you grab a mop, you need to know where it is coming from, because the cause decides what to do next.
Short answer: Water at the base of a toilet comes from one of four places: condensation on a cold tank, a leaking supply line or tank bolt, a failed wax ring or loose toilet at the floor, or a crack in the porcelain.
A cold tank in a warm, damp room collects water drops on the outside, the same way a glass of iced tea does. The drops run down the tank and the bowl and pool at the base. It looks like a leak and it is not one.
This is common in basements and in bathrooms over crawlspaces in the North Georgia mountains, where summer air is heavy and the water coming in is cold. Well water often runs colder than city water, so the tank gets colder too.
Here is the test that sorts it out. Dry the whole toilet with a towel: tank, bowl, supply line, and the floor. Lay a few dry paper towels around the base. Do not flush. Check back in an hour.
Not sure where the water is coming from?
Text Ryan a photo of the base of the toilet and the floor around it. He answers his own phone, day or night.
The small hose or tube that runs from the wall to the bottom of the tank can drip at either end. Run a dry paper towel along it. If the towel gets wet, the leak is at a connection or the valve stem. Sometimes a quarter turn on a loose nut stops it. If the valve itself drips around the handle, it is worn out and needs to be replaced.
Two bolts hold the tank to the bowl, and a rubber gasket seals the gap between them. When the gasket hardens, water drips from the bottom of the tank, runs down the back of the bowl, and lands at the base. You will see drips under the tank, and you will often see them between flushes, not only during them.
This is the most common cause when the leak shows up right after you flush. The toilet sits on a flange, which is a ring bolted to the floor over the drain pipe. A wax ring is squeezed between the bottom of the toilet and the flange. It makes the seal that keeps wastewater in the pipe.
A wax ring fails for a few reasons. The toilet has been rocking for years. The flange sits too low or is cracked or rusted. A past leak rotted the floor under the flange. Or the toilet was moved once and the old ring was reused.
A fast check: grab the bowl with both hands and try to rock it side to side. If it shifts at all, the seal is not holding. Any movement wears the wax and starts the next leak.
Hairline cracks in porcelain are rare, but they happen after a hard knock or from overtightening bolts. Water seeps out of the crack and pools below. If you can see a line in the porcelain with a flashlight and the leak keeps coming back after you replace parts, the toilet itself is done.
If you tighten the bolts and the toilet still rocks, or the leak comes back on the next flush, the wax ring and flange need work. That means the toilet has to come off the floor. It is not hard for a plumber, but it is messy, and the real job is checking what is underneath.
A slow leak at the base can run for months before you notice. Water goes into the subfloor, then into the framing. In a house with a crawlspace, it drips into the dark under the bathroom, where nobody looks.
Look for these signs:
A soft floor is the reason not to wait. A wax ring is a small part. A rotted subfloor is a bigger repair that grows every week the water keeps coming.
Sometimes. A toilet that is partly blocked can send water up and out around the base instead of down the drain. If the bowl drains slowly, gurgles, or has been clogging, the leak may be a symptom of that. See why a toilet keeps clogging. If wastewater is coming up in the tub or other drains too, read toilet backing up first.
If you are on septic, a full tank or a tired drain field can do the same thing. That is a different problem from a bad seal, and it is one reason Ryan wants to look before replacing parts. He does septic system repair as well as plumbing, so it is one call either way.
Ryan is a licensed Master Plumber. The estimate is free, with no trip fee and no diagnostic fee, so you know the price before any work starts. The work is backed by a warranty, and the terms are given to you in writing at the estimate. If a new toilet is the better answer, he installs those too: see toilet repair and replacement.
Some handy homeowners do. You shut off the water, drain the tank and bowl, lift the toilet off, scrape the old wax, set a new ring, and set the toilet back down. The risk is what you find under it: a damaged flange or a soft floor. If you see either, stop and call.
That points to the seal at the floor. Flushing sends a rush of water through the drain, and if the wax ring or flange is not sealing, some of it escapes at the base. A leak that happens only on flush is wastewater, so keep people away from it.
A few drops from sweating is not. A leak on every flush is not a same-minute emergency, but it should not wait weeks. Water in the subfloor gets worse the longer it sits, so call or text within a day or two.
Dry everything, put paper towels around the base, and do not flush for an hour. If the tank and bowl bead up with water again, it is condensation. If the water only appears after a flush, it is the bottom seal. A single wet spot at the hose or a bolt points to that part.
If it leaks on flush, no. Close the shutoff valve and use another bathroom if you have one. If you only have one, text Ryan and tell him that. Do not keep flushing onto the floor.
Call or text. Text often gets through when cell service is weak. Free estimate, no trip fee, no diagnostic fee.