A running toilet is the quietest expensive thing in a house.
Toilets fail in a small number of predictable ways, and most of them are repairs rather than replacements. The exception is a leak at the base, which people often ignore and shouldn't.
The EPA puts the cost of a single dripping fixture at roughly 3,000 gallons a year at one drip per second. A toilet that runs continuously goes through considerably more than that, silently, until the bill arrives.
| Symptom | Usual cause | Repair or replace |
|---|---|---|
| Runs constantly | Worn flapper or a fill valve not shutting off | Repair, inexpensive |
| Refills by itself periodically | Slow flapper leak letting the tank drain | Repair |
| Weak or incomplete flush | Blocked rim jets, low tank level, or a partial blockage | Repair |
| Water at the base | Failed wax seal, or a cracked pan | Reseal, or replace if cracked |
| Rocking on the floor | Loose flange bolts or a damaged flange | Repair, but do it promptly |
| Blocks repeatedly | Low flow model, partial branch blockage, or the main line | Investigate before replacing |
| Sewer smell | Failed seal or a venting problem | Repair |
A toilet that rocks, or shows water at the base, is leaking at the floor connection. That water goes into the subfloor rather than across it, so there's very little to see while a lot happens. On a timber subfloor it rots; on a slab it finds its way under the finish. Either way, what starts as a seal replacement turns into a flooring job if left.
If yours moves when you sit on it, that's the fix to book.
Most toilets are worth repairing. Flappers, fill valves, flush valves and seals are inexpensive parts and a working toilet is a working toilet.
Replacement makes sense when the pan is cracked, when an old high volume model is costing real money in water, when it's blocking constantly because of poor design rather than anything in the line, or when you're replacing the floor anyway and it has to come out regardless.
The flange is where cheap installs go wrong. It's underneath, nobody sees it, and a toilet set on a damaged one will come loose within a year.
If a toilet backs up and you're on septic, don't assume the toilet is the problem. A full tank produces exactly the same symptom, and so does a drain field that's stopped accepting water. The giveaway is whether other fixtures are slow too. Since we run both trades, we check rather than guess, which saves you paying for a toilet repair that was never going to fix anything.
Worth repeating because it causes so much of this work. Wipes sold as flushable clear the pan and then fail to break down, so they accumulate in the branch, the lateral or a grinder pump. If a toilet in a rental or a shared building blocks repeatedly with no obvious cause, this is almost always it.
A flapper or a fill valve is an inexpensive part, and the EPA puts a single dripping fixture at roughly 3,000 gallons a year. Most toilet faults are repairs. We would rather do the repair than sell you a pan you did not need, and we will tell you when it genuinely is time to replace.
On a septic property, a backed up toilet and a full tank produce exactly the same symptom. Florida license CFC1425985 alongside septic capability means we look at both, which saves you paying for a repair that was never going to fix anything.
Plenty of companies treat a toilet call as filler between the profitable work. Our 4.7 across 1,179 Google reviews covers thousands of jobs at every size, and the small ones are where habits show most clearly.
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Almost always the flapper or the fill valve. The flapper seals the tank and hardens with age until it no longer seats; the fill valve can fail to shut off. Both are inexpensive parts and a quick repair, and both waste a surprising amount of water while you wait.
Yes, worth dealing with promptly. It usually means a failed seal at the floor connection, and that water goes into the subfloor rather than across it. Left alone, a straightforward reseal becomes a flooring repair.
Most are worth repairing, since the common failures are cheap parts. Replacement makes sense if the pan is cracked, if it's an old high volume model costing real money in water, or if the floor is coming up anyway.
It does. Movement breaks the seal underneath, and a toilet that rocks is usually already leaking into the floor. It's also often a sign the flange beneath is damaged, which is the part that needs attention.
Yes. They pass through the toilet and then don't break down, so they accumulate further down the line or wrap a grinder pump. They're one of the most common causes of repeat blockages we see.
When the blockage is further down than the toilet.
Learn moreTaps, sinks and garbage disposal repair.
Learn moreWhen a backed up toilet is really a full tank.
Learn moreAbout Tampa Bay Plumbers or see every service and area we cover.
Describe what it's doing and roughly how old it is. Most toilet faults narrow down fast over the phone.
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Figures above are cited as published by their source. Opens in a new tab.
